diff --git a/Directory.Packages.props b/Directory.Packages.props
index 595b6f7e..40ad15fe 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -4,7 +4,7 @@
     <PackageVersion Include="Glob" Version="1.1.9" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageVersion Include="SimpleExec" Version="12.0.0" />
-    <PackageVersion Include="Speckle.ProxyGenerator" Version="0.1.6" />
+    <PackageVersion Include="Speckle.ProxyGenerator" Version="0.1.7" />
     <PackageVersion Include="Mapster" Version="7.3.0" />
     <PackageVersion Include="MinVer" Version="5.0.0" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
@@ -15,4 +15,4 @@
     <PackageVersion Include="NUnit.Analyzers" Version="4.2.0" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/Revit/Revit2023/Speckle.Revit2023.Api/packages.lock.json b/Revit/Revit2023/Speckle.Revit2023.Api/packages.lock.json
index b858cfd8..7511a9f7 100644
--- a/Revit/Revit2023/Speckle.Revit2023.Api/packages.lock.json
+++ b/Revit/Revit2023/Speckle.Revit2023.Api/packages.lock.json
@@ -31,9 +31,9 @@
       },
       "Speckle.ProxyGenerator": {
         "type": "Direct",
-        "requested": "[0.1.6, )",
-        "resolved": "0.1.6",
-        "contentHash": "SO9Udllol9Krpq+UFBr54Es79kmiIQmtSRXKFcvplnisdwmjo5CBlucuuvgZYmQUSvF/9KC4BcuVllZRTCBDHQ=="
+        "requested": "[0.1.7, )",
+        "resolved": "0.1.7",
+        "contentHash": "CyMcXENu9e5qHPPbcSTMAtYt4AYHaFaeo/WL7Qhw4MiQyEk+j2ZFsDRY3YxWDmrp41gMcOmuXUPzFEWd0A6YYA=="
       },
       "Speckle.Revit.API": {
         "type": "Direct",
diff --git a/Revit/Revit2024/Speckle.Revit2024.Api/packages.lock.json b/Revit/Revit2024/Speckle.Revit2024.Api/packages.lock.json
index 6a5fffd8..50da5882 100644
--- a/Revit/Revit2024/Speckle.Revit2024.Api/packages.lock.json
+++ b/Revit/Revit2024/Speckle.Revit2024.Api/packages.lock.json
@@ -31,9 +31,9 @@
       },
       "Speckle.ProxyGenerator": {
         "type": "Direct",
-        "requested": "[0.1.6, )",
-        "resolved": "0.1.6",
-        "contentHash": "SO9Udllol9Krpq+UFBr54Es79kmiIQmtSRXKFcvplnisdwmjo5CBlucuuvgZYmQUSvF/9KC4BcuVllZRTCBDHQ=="
+        "requested": "[0.1.7, )",
+        "resolved": "0.1.7",
+        "contentHash": "CyMcXENu9e5qHPPbcSTMAtYt4AYHaFaeo/WL7Qhw4MiQyEk+j2ZFsDRY3YxWDmrp41gMcOmuXUPzFEWd0A6YYA=="
       },
       "Speckle.Revit.API": {
         "type": "Direct",
diff --git a/Revit/Speckle.Revit.Api/RevitFilterFactory.cs b/Revit/Speckle.Revit.Api/RevitFilterFactory.cs
index b8217f8a..45390136 100644
--- a/Revit/Speckle.Revit.Api/RevitFilterFactory.cs
+++ b/Revit/Speckle.Revit.Api/RevitFilterFactory.cs
@@ -98,12 +98,12 @@ public partial interface IRevitFilteredElementCollectorProxy : IRevitFilteredEle
 
 public partial class FilteredElementCollectorProxy
 {
-  public IEnumerable<T> OfClass<T>(IProxyMap proxyMap) =>
+  public IEnumerable<T> OfClass<T>() =>
     _Instance
       .OfClass(
-        proxyMap.GetHostTypeFromMappedType(typeof(T))
+        ProxyMap.GetHostTypeFromMappedType(typeof(T))
           ?? throw new InvalidOperationException($"Could not unmap type: {typeof(T).FullName}")
       )
-      .Select(x => proxyMap.CreateProxy(typeof(T), x))
+      .Select(x => ProxyMap.CreateProxy(typeof(T), x))
       .Cast<T>();
 }
diff --git a/Revit/Speckle.Revit.Interfaces/IRevitCurve.cs b/Revit/Speckle.Revit.Interfaces/IRevitCurve.cs
index 2de57f6d..e77b7893 100644
--- a/Revit/Speckle.Revit.Interfaces/IRevitCurve.cs
+++ b/Revit/Speckle.Revit.Interfaces/IRevitCurve.cs
@@ -101,12 +101,6 @@ public interface IRevitGroup : IRevitElement
   IList<IRevitElementId> GetMemberIds();
 }
 
-public interface IRevitSolid : IRevitGeometryObject
-{
-  IRevitFaceArray Faces { get; }
-  double SurfaceArea { get; }
-}
-
 public interface IRevitFace
 {
   IRevitMesh Triangulate();
diff --git a/Revit/Speckle.Revit.Interfaces/IRevitFilterFactory.cs b/Revit/Speckle.Revit.Interfaces/IRevitFilterFactory.cs
index 99d8a564..97b5df18 100644
--- a/Revit/Speckle.Revit.Interfaces/IRevitFilterFactory.cs
+++ b/Revit/Speckle.Revit.Interfaces/IRevitFilterFactory.cs
@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace Speckle.Revit.Interfaces;
 
@@ -19,31 +19,3 @@ params IRevitElementId[] elementIds
   IRevitPointCloudFilter CreateMultiPlaneFilter(params IRevitPlane[] planes);
   IRevitElementCategoryFilter CreateElementCategoryFilter(RevitBuiltInCategory category);
 }
-
-public interface IProxyMap
-{
-  Type? GetMappedTypeFromHostType(Type type);
-  Type? GetMappedTypeFromProxyType(Type type);
-  Type? GetHostTypeFromMappedType(Type type);
-
-  object CreateProxy(Type type, object toWrap);
-}
-
-// ghetto default interface implementation :(
-public static class ProxyMapExtensions
-{
-  public static (Type, object)? WrapIfExists(this IProxyMap proxyMap, Type target, object toWrap)
-  {
-    var mappedType = proxyMap.GetMappedTypeFromHostType(target);
-    if (mappedType is not null)
-    {
-      return (mappedType, proxyMap.CreateProxy(mappedType, toWrap));
-    }
-    mappedType = proxyMap.GetMappedTypeFromProxyType(target);
-    if (mappedType is not null)
-    {
-      return (mappedType, toWrap);
-    }
-    return null;
-  }
-}
diff --git a/Revit/Speckle.Revit.Interfaces/IRevitFilteredElementCollector.cs b/Revit/Speckle.Revit.Interfaces/IRevitFilteredElementCollector.cs
index caefcae7..731d1acc 100644
--- a/Revit/Speckle.Revit.Interfaces/IRevitFilteredElementCollector.cs
+++ b/Revit/Speckle.Revit.Interfaces/IRevitFilteredElementCollector.cs
@@ -2,5 +2,5 @@
 
 public interface IRevitFilteredElementCollector : IRevitElementFilter
 {
-  IEnumerable<T> OfClass<T>(IProxyMap proxyMap);
+  IEnumerable<T> OfClass<T>();
 }
diff --git a/Revit/Speckle.Revit.Interfaces/IRevitSolid.cs b/Revit/Speckle.Revit.Interfaces/IRevitSolid.cs
new file mode 100644
index 00000000..05653c60
--- /dev/null
+++ b/Revit/Speckle.Revit.Interfaces/IRevitSolid.cs
@@ -0,0 +1,8 @@
+#nullable enable
+namespace Speckle.Revit.Interfaces;
+
+public interface IRevitSolid : IRevitGeometryObject
+{
+  IRevitFaceArray Faces { get; }
+  double SurfaceArea { get; }
+}