diff --git a/SabreTools.DatFiles/DatFile.Removal.cs b/SabreTools.DatFiles/DatFile.Removal.cs
new file mode 100644
index 00000000..4bcc6bae
--- /dev/null
+++ b/SabreTools.DatFiles/DatFile.Removal.cs
@@ -0,0 +1,413 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using SabreTools.Core;
+using SabreTools.Core.Tools;
+using SabreTools.DatItems;
+using SabreTools.DatItems.Formats;
+
+namespace SabreTools.DatFiles
+{
+    public partial class DatFile
+    {
+        #region Removal
+
+        /// <summary>
+        /// Remove fields indicated by the three input lists
+        /// </summary>
+        public void ApplyRemovals(List<string> headerFieldNames, List<string> machineFieldNames, Dictionary<string, List<string>> itemFieldNames)
+        {
+            // Remove DatHeader fields
+            if (headerFieldNames.Count > 0)
+                RemoveHeaderFields(headerFieldNames);
+
+            // Remove DatItem and Machine fields
+            if (machineFieldNames.Count > 0 || itemFieldNames.Count > 0)
+            {
+                ApplyRemovalsItemDictionary(machineFieldNames, itemFieldNames);
+                ApplyRemovalsItemDictionaryDB(machineFieldNames, itemFieldNames);
+            }
+        }
+
+        /// <summary>
+        /// Apply removals to the item dictionary
+        /// </summary>
+        private void ApplyRemovalsItemDictionary(List<string> machineFieldNames, Dictionary<string, List<string>> itemFieldNames)
+        {
+#if NET452_OR_GREATER || NETCOREAPP
+            Parallel.ForEach(Items.Keys, Globals.ParallelOptions, key =>
+#elif NET40_OR_GREATER
+            Parallel.ForEach(Items.Keys, key =>
+#else
+            foreach (var key in Items.Keys)
+#endif
+            {
+                ConcurrentList<DatItem>? items = Items[key];
+                if (items == null)
+#if NET40_OR_GREATER || NETCOREAPP
+                    return;
+#else
+                    continue;
+#endif
+
+                for (int j = 0; j < items.Count; j++)
+                {
+                    RemoveFields(items[j], machineFieldNames, itemFieldNames);
+                }
+#if NET40_OR_GREATER || NETCOREAPP
+            });
+#else
+            }
+#endif
+        }
+
+        /// <summary>
+        /// Apply removals to the item dictionary
+        /// </summary>
+        private void ApplyRemovalsItemDictionaryDB(List<string> machineFieldNames, Dictionary<string, List<string>> itemFieldNames)
+        {
+#if NET452_OR_GREATER || NETCOREAPP
+            Parallel.ForEach(ItemsDB.SortedKeys, Globals.ParallelOptions, key =>
+#elif NET40_OR_GREATER
+            Parallel.ForEach(ItemsDB.SortedKeys, key =>
+#else
+            foreach (var key in ItemsDB.SortedKeys)
+#endif
+            {
+                var items = ItemsDB.GetDatItemsForBucket(key);
+                if (items == null)
+#if NET40_OR_GREATER || NETCOREAPP
+                    return;
+#else
+                    continue;
+#endif
+
+                for (int j = 0; j < items.Length; j++)
+                {
+                    RemoveFields(items[j].Item2, machineFieldNames, itemFieldNames);
+                }
+#if NET40_OR_GREATER || NETCOREAPP
+            });
+#else
+            }
+#endif
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        private void RemoveHeaderFields(List<string> headerFieldNames)
+        {
+            // If we have an invalid input, return
+            if (Header == null || !headerFieldNames.Any())
+                return;
+
+            foreach (var fieldName in headerFieldNames)
+            {
+                Header.RemoveField(fieldName);
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        private static void RemoveFields(Machine? machine, List<string> machineFieldNames)
+        {
+            // If we have an invalid input, return
+            if (machine == null || !machineFieldNames.Any())
+                return;
+
+            foreach (var fieldName in machineFieldNames)
+            {
+                machine.RemoveField(fieldName);
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="datItem">DatItem to remove fields from</param>
+        private static void RemoveFields(DatItem? datItem, List<string> machineFieldNames, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (datItem == null)
+                return;
+
+            #region Common
+
+            // Handle Machine fields
+            if (machineFieldNames.Any() && datItem.GetFieldValue<Machine>(DatItem.MachineKey) != null)
+                RemoveFields(datItem.GetFieldValue<Machine>(DatItem.MachineKey), machineFieldNames);
+
+            // If there are no field names, return
+            if (itemFieldNames == null || !itemFieldNames.Any())
+                return;
+
+            // If there are no field names for this type or generic, return
+            string? itemType = datItem.GetStringFieldValue(Models.Metadata.DatItem.TypeKey).AsEnumValue<ItemType>().AsStringValue();
+            if (itemType == null || (!itemFieldNames.ContainsKey(itemType) && !itemFieldNames.ContainsKey("item")))
+                return;
+
+            // Get the combined list of fields to remove
+            var fieldNames = new List<string>();
+            if (itemFieldNames.ContainsKey(itemType))
+                fieldNames.AddRange(itemFieldNames[itemType]);
+            if (itemFieldNames.ContainsKey("item"))
+                fieldNames.AddRange(itemFieldNames["item"]);
+            fieldNames = fieldNames.Distinct().ToList();
+
+            // If the field specifically contains Name, set it separately
+            if (fieldNames.Contains(Models.Metadata.Rom.NameKey))
+                datItem.SetName(null);
+
+            #endregion
+
+            #region Item-Specific
+
+            // Handle unnested removals first
+            foreach (var datItemField in fieldNames)
+            {
+                datItem.RemoveField(datItemField);
+            }
+
+            // Handle nested removals
+            switch (datItem)
+            {
+                case Adjuster adjuster: RemoveFields(adjuster, itemFieldNames); break;
+                case Configuration configuration: RemoveFields(configuration, itemFieldNames); break;
+                case ConfSetting confSetting: RemoveFields(confSetting, itemFieldNames); break;
+                case Device device: RemoveFields(device, itemFieldNames); break;
+                case DipSwitch dipSwitch: RemoveFields(dipSwitch, itemFieldNames); break;
+                case DipValue dipValue: RemoveFields(dipValue, itemFieldNames); break;
+                case Disk disk: RemoveFields(disk, itemFieldNames); break;
+                case Input input: RemoveFields(input, itemFieldNames); break;
+                case Part part: RemoveFields(part, itemFieldNames); break;
+                case Port port: RemoveFields(port, itemFieldNames); break;
+                case Rom rom: RemoveFields(rom, itemFieldNames); break;
+                case Slot slot: RemoveFields(slot, itemFieldNames); break;
+            }
+
+            #endregion
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="adjuster">Adjuster to remove fields from</param>
+        private static void RemoveFields(Adjuster adjuster, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (!adjuster.ConditionsSpecified)
+                return;
+
+            foreach (Condition subCondition in adjuster.GetFieldValue<Condition[]?>(Models.Metadata.Adjuster.ConditionKey)!)
+            {
+                RemoveFields(subCondition, [], itemFieldNames);
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="configuration">Configuration to remove fields from</param>
+        private static void RemoveFields(Configuration configuration, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (configuration.ConditionsSpecified)
+            {
+                foreach (Condition subCondition in configuration.GetFieldValue<Condition[]?>(Models.Metadata.Configuration.ConditionKey)!)
+                {
+                    RemoveFields(subCondition, [], itemFieldNames);
+                }
+            }
+
+            if (configuration.LocationsSpecified)
+            {
+                foreach (ConfLocation subLocation in configuration.GetFieldValue<ConfLocation[]?>(Models.Metadata.Configuration.ConfLocationKey)!)
+                {
+                    RemoveFields(subLocation, [], itemFieldNames);
+                }
+            }
+
+            if (configuration.SettingsSpecified)
+            {
+                foreach (ConfSetting subSetting in configuration.GetFieldValue<ConfSetting[]?>(Models.Metadata.Configuration.ConfSettingKey)!)
+                {
+                    RemoveFields(subSetting as DatItem, [], itemFieldNames);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="confsetting">ConfSetting to remove fields from</param>
+        private static void RemoveFields(ConfSetting confsetting, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (confsetting.ConditionsSpecified)
+            {
+                foreach (Condition subCondition in confsetting.GetFieldValue<Condition[]?>(Models.Metadata.ConfSetting.ConditionKey)!)
+                {
+                    RemoveFields(subCondition, [], itemFieldNames);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="device">Device to remove fields from</param>
+        private static void RemoveFields(Device device, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (device.ExtensionsSpecified)
+            {
+                foreach (Extension subExtension in device.GetFieldValue<Extension[]?>(Models.Metadata.Device.ExtensionKey)!)
+                {
+                    RemoveFields(subExtension, [], itemFieldNames);
+                }
+            }
+
+            if (device.InstancesSpecified)
+            {
+                foreach (Instance subInstance in device.GetFieldValue<Instance[]?>(Models.Metadata.Device.InstanceKey)!)
+                {
+                    RemoveFields(subInstance, [], itemFieldNames);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="dipSwitch">DipSwitch to remove fields from</param>
+        private static void RemoveFields(DipSwitch dipSwitch, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (dipSwitch.ConditionsSpecified)
+            {
+                foreach (Condition subCondition in dipSwitch.GetFieldValue<Condition[]?>(Models.Metadata.DipSwitch.ConditionKey)!)
+                {
+                    RemoveFields(subCondition, [], itemFieldNames);
+                }
+            }
+
+            if (dipSwitch.LocationsSpecified)
+            {
+                foreach (DipLocation subLocation in dipSwitch.GetFieldValue<DipLocation[]?>(Models.Metadata.DipSwitch.DipLocationKey)!)
+                {
+                    RemoveFields(subLocation, [], itemFieldNames);
+                }
+            }
+
+            if (dipSwitch.ValuesSpecified)
+            {
+                foreach (DipValue subValue in dipSwitch.GetFieldValue<DipValue[]?>(Models.Metadata.DipSwitch.DipValueKey)!)
+                {
+                    RemoveFields(subValue as DatItem, [], itemFieldNames);
+                }
+            }
+
+            if (dipSwitch.PartSpecified)
+                RemoveFields(dipSwitch.GetFieldValue<Part?>(DipSwitch.PartKey)! as DatItem, [], itemFieldNames);
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="dipValue">DipValue to remove fields from</param>
+        private static void RemoveFields(DipValue dipValue, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (dipValue.ConditionsSpecified)
+            {
+                foreach (Condition subCondition in dipValue.GetFieldValue<Condition[]?>(Models.Metadata.DipValue.ConditionKey)!)
+                {
+                    RemoveFields(subCondition, [], itemFieldNames);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="disk">Disk to remove fields from</param>
+        private static void RemoveFields(Disk disk, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (disk.DiskAreaSpecified)
+                RemoveFields(disk.GetFieldValue<DiskArea?>(Disk.DiskAreaKey)! as DatItem, [], itemFieldNames);
+
+            if (disk.PartSpecified)
+                RemoveFields(disk.GetFieldValue<Part?>(Disk.PartKey)! as DatItem, [], itemFieldNames);
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="input">Input to remove fields from</param>
+        private static void RemoveFields(Input input, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (input.ControlsSpecified)
+            {
+                foreach (Control subControl in input.GetFieldValue<Control[]?>(Models.Metadata.Input.ControlKey)!)
+                {
+                    RemoveFields(subControl, [], itemFieldNames);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="part">Part to remove fields from</param>
+        private static void RemoveFields(Part part, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (part.FeaturesSpecified)
+            {
+                foreach (PartFeature subPartFeature in part.GetFieldValue<PartFeature[]?>(Models.Metadata.Part.FeatureKey)!)
+                {
+                    RemoveFields(subPartFeature, [], itemFieldNames);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="port">Port to remove fields from</param>
+        private static void RemoveFields(Port port, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (port.AnalogsSpecified)
+            {
+                foreach (Analog subAnalog in port.GetFieldValue<Analog[]?>(Models.Metadata.Port.AnalogKey)!)
+                {
+                    RemoveFields(subAnalog, [], itemFieldNames);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="rom">Rom to remove fields from</param>
+        private static void RemoveFields(Rom rom, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (rom.DataAreaSpecified)
+                RemoveFields(rom.GetFieldValue<DataArea?>(Rom.DataAreaKey)!, [], itemFieldNames);
+
+            if (rom.PartSpecified)
+                RemoveFields(rom.GetFieldValue<Part?>(Rom.PartKey)! as DatItem, [], itemFieldNames);
+        }
+
+        /// <summary>
+        /// Remove fields with given values
+        /// </summary>
+        /// <param name="slot">Slot to remove fields from</param>
+        private static void RemoveFields(Slot slot, Dictionary<string, List<string>> itemFieldNames)
+        {
+            if (slot.SlotOptionsSpecified)
+            {
+                foreach (SlotOption subSlotOption in slot.GetFieldValue<SlotOption[]?>(Models.Metadata.Slot.SlotOptionKey)!)
+                {
+                    RemoveFields(subSlotOption, [], itemFieldNames);
+                }
+            }
+        }
+
+        #endregion
+    }
+}
diff --git a/SabreTools.DatFiles/DatFile.cs b/SabreTools.DatFiles/DatFile.cs
index 99a9977d..4e062916 100644
--- a/SabreTools.DatFiles/DatFile.cs
+++ b/SabreTools.DatFiles/DatFile.cs
@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
-using System.Threading.Tasks;
 using System.Xml.Serialization;
 using Newtonsoft.Json;
 using SabreTools.Core;
@@ -215,406 +214,6 @@ namespace SabreTools.DatFiles
 
         #endregion
 
-        #region Removal
-
-        /// <summary>
-        /// Remove fields indicated by the three input lists
-        /// </summary>
-        public void ApplyRemovals(List<string> headerFieldNames, List<string> machineFieldNames, Dictionary<string, List<string>> itemFieldNames)
-        {
-            // Remove DatHeader fields
-            if (headerFieldNames.Count > 0)
-                RemoveHeaderFields(headerFieldNames);
-
-            // Remove DatItem and Machine fields
-            if (machineFieldNames.Count > 0 || itemFieldNames.Count > 0)
-            {
-                ApplyRemovalsItemDictionary(machineFieldNames, itemFieldNames);
-                ApplyRemovalsItemDictionaryDB(machineFieldNames, itemFieldNames);
-            }
-        }
-
-        /// <summary>
-        /// Apply removals to the item dictionary
-        /// </summary>
-        private void ApplyRemovalsItemDictionary(List<string> machineFieldNames, Dictionary<string, List<string>> itemFieldNames)
-        {
-#if NET452_OR_GREATER || NETCOREAPP
-            Parallel.ForEach(Items.Keys, Globals.ParallelOptions, key =>
-#elif NET40_OR_GREATER
-            Parallel.ForEach(Items.Keys, key =>
-#else
-            foreach (var key in Items.Keys)
-#endif
-            {
-                ConcurrentList<DatItem>? items = Items[key];
-                if (items == null)
-#if NET40_OR_GREATER || NETCOREAPP
-                    return;
-#else
-                    continue;
-#endif
-
-                for (int j = 0; j < items.Count; j++)
-                {
-                    RemoveFields(items[j], machineFieldNames, itemFieldNames);
-                }
-#if NET40_OR_GREATER || NETCOREAPP
-            });
-#else
-            }
-#endif
-        }
-
-        /// <summary>
-        /// Apply removals to the item dictionary
-        /// </summary>
-        private void ApplyRemovalsItemDictionaryDB(List<string> machineFieldNames, Dictionary<string, List<string>> itemFieldNames)
-        {
-#if NET452_OR_GREATER || NETCOREAPP
-            Parallel.ForEach(ItemsDB.SortedKeys, Globals.ParallelOptions, key =>
-#elif NET40_OR_GREATER
-            Parallel.ForEach(ItemsDB.SortedKeys, key =>
-#else
-            foreach (var key in ItemsDB.SortedKeys)
-#endif
-            {
-                var items = ItemsDB.GetDatItemsForBucket(key);
-                if (items == null)
-#if NET40_OR_GREATER || NETCOREAPP
-                    return;
-#else
-                    continue;
-#endif
-
-                for (int j = 0; j < items.Length; j++)
-                {
-                    RemoveFields(items[j].Item2, machineFieldNames, itemFieldNames);
-                }
-#if NET40_OR_GREATER || NETCOREAPP
-            });
-#else
-            }
-#endif
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        private void RemoveHeaderFields(List<string> headerFieldNames)
-        {
-            // If we have an invalid input, return
-            if (Header == null || !headerFieldNames.Any())
-                return;
-
-            foreach (var fieldName in headerFieldNames)
-            {
-                Header.RemoveField(fieldName);
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        private void RemoveFields(Machine? machine, List<string> machineFieldNames)
-        {
-            // If we have an invalid input, return
-            if (machine == null || !machineFieldNames.Any())
-                return;
-
-            foreach (var fieldName in machineFieldNames)
-            {
-                machine.RemoveField(fieldName);
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="datItem">DatItem to remove fields from</param>
-        private void RemoveFields(DatItem? datItem, List<string> machineFieldNames, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (datItem == null)
-                return;
-
-            #region Common
-
-            // Handle Machine fields
-            if (machineFieldNames.Any() && datItem.GetFieldValue<Machine>(DatItem.MachineKey) != null)
-                RemoveFields(datItem.GetFieldValue<Machine>(DatItem.MachineKey), machineFieldNames);
-
-            // If there are no field names, return
-            if (itemFieldNames == null || !itemFieldNames.Any())
-                return;
-
-            // If there are no field names for this type or generic, return
-            string? itemType = datItem.GetStringFieldValue(Models.Metadata.DatItem.TypeKey).AsEnumValue<ItemType>().AsStringValue();
-            if (itemType == null || (!itemFieldNames.ContainsKey(itemType) && !itemFieldNames.ContainsKey("item")))
-                return;
-
-            // Get the combined list of fields to remove
-            var fieldNames = new List<string>();
-            if (itemFieldNames.ContainsKey(itemType))
-                fieldNames.AddRange(itemFieldNames[itemType]);
-            if (itemFieldNames.ContainsKey("item"))
-                fieldNames.AddRange(itemFieldNames["item"]);
-            fieldNames = fieldNames.Distinct().ToList();
-
-            // If the field specifically contains Name, set it separately
-            if (fieldNames.Contains(Models.Metadata.Rom.NameKey))
-                datItem.SetName(null);
-
-            #endregion
-
-            #region Item-Specific
-
-            // Handle unnested removals first
-            foreach (var datItemField in fieldNames)
-            {
-                datItem.RemoveField(datItemField);
-            }
-
-            // Handle nested removals
-            switch (datItem)
-            {
-                case Adjuster adjuster: RemoveFields(adjuster, itemFieldNames); break;
-                case Configuration configuration: RemoveFields(configuration, itemFieldNames); break;
-                case ConfSetting confSetting: RemoveFields(confSetting, itemFieldNames); break;
-                case Device device: RemoveFields(device, itemFieldNames); break;
-                case DipSwitch dipSwitch: RemoveFields(dipSwitch, itemFieldNames); break;
-                case DipValue dipValue: RemoveFields(dipValue, itemFieldNames); break;
-                case Disk disk: RemoveFields(disk, itemFieldNames); break;
-                case Input input: RemoveFields(input, itemFieldNames); break;
-                case Part part: RemoveFields(part, itemFieldNames); break;
-                case Port port: RemoveFields(port, itemFieldNames); break;
-                case Rom rom: RemoveFields(rom, itemFieldNames); break;
-                case Slot slot: RemoveFields(slot, itemFieldNames); break;
-            }
-
-            #endregion
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="adjuster">Adjuster to remove fields from</param>
-        private void RemoveFields(Adjuster adjuster, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (!adjuster.ConditionsSpecified)
-                return;
-
-            foreach (Condition subCondition in adjuster.GetFieldValue<Condition[]?>(Models.Metadata.Adjuster.ConditionKey)!)
-            {
-                RemoveFields(subCondition, [], itemFieldNames);
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="configuration">Configuration to remove fields from</param>
-        private void RemoveFields(Configuration configuration, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (configuration.ConditionsSpecified)
-            {
-                foreach (Condition subCondition in configuration.GetFieldValue<Condition[]?>(Models.Metadata.Configuration.ConditionKey)!)
-                {
-                    RemoveFields(subCondition, [], itemFieldNames);
-                }
-            }
-
-            if (configuration.LocationsSpecified)
-            {
-                foreach (ConfLocation subLocation in configuration.GetFieldValue<ConfLocation[]?>(Models.Metadata.Configuration.ConfLocationKey)!)
-                {
-                    RemoveFields(subLocation, [], itemFieldNames);
-                }
-            }
-
-            if (configuration.SettingsSpecified)
-            {
-                foreach (ConfSetting subSetting in configuration.GetFieldValue<ConfSetting[]?>(Models.Metadata.Configuration.ConfSettingKey)!)
-                {
-                    RemoveFields(subSetting as DatItem, [], itemFieldNames);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="confsetting">ConfSetting to remove fields from</param>
-        private void RemoveFields(ConfSetting confsetting, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (confsetting.ConditionsSpecified)
-            {
-                foreach (Condition subCondition in confsetting.GetFieldValue<Condition[]?>(Models.Metadata.ConfSetting.ConditionKey)!)
-                {
-                    RemoveFields(subCondition, [], itemFieldNames);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="device">Device to remove fields from</param>
-        private void RemoveFields(Device device, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (device.ExtensionsSpecified)
-            {
-                foreach (Extension subExtension in device.GetFieldValue<Extension[]?>(Models.Metadata.Device.ExtensionKey)!)
-                {
-                    RemoveFields(subExtension, [], itemFieldNames);
-                }
-            }
-
-            if (device.InstancesSpecified)
-            {
-                foreach (Instance subInstance in device.GetFieldValue<Instance[]?>(Models.Metadata.Device.InstanceKey)!)
-                {
-                    RemoveFields(subInstance, [], itemFieldNames);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="dipSwitch">DipSwitch to remove fields from</param>
-        private void RemoveFields(DipSwitch dipSwitch, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (dipSwitch.ConditionsSpecified)
-            {
-                foreach (Condition subCondition in dipSwitch.GetFieldValue<Condition[]?>(Models.Metadata.DipSwitch.ConditionKey)!)
-                {
-                    RemoveFields(subCondition, [], itemFieldNames);
-                }
-            }
-
-            if (dipSwitch.LocationsSpecified)
-            {
-                foreach (DipLocation subLocation in dipSwitch.GetFieldValue<DipLocation[]?>(Models.Metadata.DipSwitch.DipLocationKey)!)
-                {
-                    RemoveFields(subLocation, [], itemFieldNames);
-                }
-            }
-
-            if (dipSwitch.ValuesSpecified)
-            {
-                foreach (DipValue subValue in dipSwitch.GetFieldValue<DipValue[]?>(Models.Metadata.DipSwitch.DipValueKey)!)
-                {
-                    RemoveFields(subValue as DatItem, [], itemFieldNames);
-                }
-            }
-
-            if (dipSwitch.PartSpecified)
-                RemoveFields(dipSwitch.GetFieldValue<Part?>(DipSwitch.PartKey)! as DatItem, [], itemFieldNames);
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="dipValue">DipValue to remove fields from</param>
-        private void RemoveFields(DipValue dipValue, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (dipValue.ConditionsSpecified)
-            {
-                foreach (Condition subCondition in dipValue.GetFieldValue<Condition[]?>(Models.Metadata.DipValue.ConditionKey)!)
-                {
-                    RemoveFields(subCondition, [], itemFieldNames);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="disk">Disk to remove fields from</param>
-        private void RemoveFields(Disk disk, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (disk.DiskAreaSpecified)
-                RemoveFields(disk.GetFieldValue<DiskArea?>(Disk.DiskAreaKey)! as DatItem, [], itemFieldNames);
-
-            if (disk.PartSpecified)
-                RemoveFields(disk.GetFieldValue<Part?>(Disk.PartKey)! as DatItem, [], itemFieldNames);
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="input">Input to remove fields from</param>
-        private void RemoveFields(Input input, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (input.ControlsSpecified)
-            {
-                foreach (Control subControl in input.GetFieldValue<Control[]?>(Models.Metadata.Input.ControlKey)!)
-                {
-                    RemoveFields(subControl, [], itemFieldNames);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="part">Part to remove fields from</param>
-        private void RemoveFields(Part part, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (part.FeaturesSpecified)
-            {
-                foreach (PartFeature subPartFeature in part.GetFieldValue<PartFeature[]?>(Models.Metadata.Part.FeatureKey)!)
-                {
-                    RemoveFields(subPartFeature, [], itemFieldNames);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="port">Port to remove fields from</param>
-        private void RemoveFields(Port port, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (port.AnalogsSpecified)
-            {
-                foreach (Analog subAnalog in port.GetFieldValue<Analog[]?>(Models.Metadata.Port.AnalogKey)!)
-                {
-                    RemoveFields(subAnalog, [], itemFieldNames);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="rom">Rom to remove fields from</param>
-        private void RemoveFields(Rom rom, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (rom.DataAreaSpecified)
-                RemoveFields(rom.GetFieldValue<DataArea?>(Rom.DataAreaKey)!, [], itemFieldNames);
-
-            if (rom.PartSpecified)
-                RemoveFields(rom.GetFieldValue<Part?>(Rom.PartKey)! as DatItem, [], itemFieldNames);
-        }
-
-        /// <summary>
-        /// Remove fields with given values
-        /// </summary>
-        /// <param name="slot">Slot to remove fields from</param>
-        private void RemoveFields(Slot slot, Dictionary<string, List<string>> itemFieldNames)
-        {
-            if (slot.SlotOptionsSpecified)
-            {
-                foreach (SlotOption subSlotOption in slot.GetFieldValue<SlotOption[]?>(Models.Metadata.Slot.SlotOptionKey)!)
-                {
-                    RemoveFields(subSlotOption, [], itemFieldNames);
-                }
-            }
-        }
-
-        #endregion
-
         #region Writing
 
         /// <summary>