diff --git a/README.md b/README.md
index f89877a..76b23d3 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ Api Assembly:
 
 - Proxy Interfaces that inherit from the base interfaces
 - Proxy attribute references wrapped Api
+- If `ImplementationOptions` is omitted then defaults are used: `ImplementationOptions.UseExtendedInterfaces | ImplementationOptions.ProxyForBaseInterface`
 
 New needs: base interface is used by wrappers.  Need to ignore members from wrapped api on demand.
 
diff --git a/src-examples/ProxyInterfaceConsumer/Http/IHttpClient.cs b/src-examples/ProxyInterfaceConsumer/Http/IHttpClient.cs
index e3052f4..b2c57ae 100644
--- a/src-examples/ProxyInterfaceConsumer/Http/IHttpClient.cs
+++ b/src-examples/ProxyInterfaceConsumer/Http/IHttpClient.cs
@@ -6,5 +6,5 @@ namespace ProxyInterfaceConsumer.Http;
 [Speckle.ProxyGenerator.Proxy(typeof(HttpClient), ImplementationOptions.ProxyBaseClasses)]
 public partial interface IHttpClient : IHttpMessageInvoker { }
 
-[Speckle.ProxyGenerator.Proxy(typeof(HttpMessageInvoker))]
+[Speckle.ProxyGenerator.Proxy(typeof(HttpMessageInvoker), ImplementationOptions.None)]
 public partial interface IHttpMessageInvoker { }
diff --git a/src-examples/ProxyInterfaceConsumer/IPersonT.cs b/src-examples/ProxyInterfaceConsumer/IPersonT.cs
index 6d2a8b4..b298614 100644
--- a/src-examples/ProxyInterfaceConsumer/IPersonT.cs
+++ b/src-examples/ProxyInterfaceConsumer/IPersonT.cs
@@ -1,6 +1,8 @@
+using Speckle.ProxyGenerator;
+
 namespace ProxyInterfaceConsumer
 {
-    [Speckle.ProxyGenerator.Proxy(typeof(ProxyInterfaceConsumer.PersonT<>))]
+    [Speckle.ProxyGenerator.Proxy(typeof(ProxyInterfaceConsumer.PersonT<>), ImplementationOptions.None)]
     public partial interface IPersonT //<T> where T : struct
     { }
 }
diff --git a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientContext.cs b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientContext.cs
index cc95bcd..6f10089 100644
--- a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientContext.cs
+++ b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientContext.cs
@@ -1,10 +1,11 @@
 using System;
 using System.Linq.Expressions;
 using Microsoft.SharePoint.Client;
+using Speckle.ProxyGenerator;
 
 namespace ProxyInterfaceConsumerForPnP.Interfaces
 {
-    [Speckle.ProxyGenerator.Proxy(typeof(ClientContext))]
+    [Speckle.ProxyGenerator.Proxy(typeof(ClientContext), ImplementationOptions.None)]
     public partial interface IClientContext : IClientRuntimeContext
     {
         void Load<TSource, TTarget>(
diff --git a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientObject.cs b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientObject.cs
index b3cf2c8..3023941 100644
--- a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientObject.cs
+++ b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientObject.cs
@@ -1,5 +1,7 @@
+using Speckle.ProxyGenerator;
+
 namespace ProxyInterfaceConsumerForPnP.Interfaces
 {
-    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.ClientObject))]
+    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.ClientObject), ImplementationOptions.None)]
     public partial interface IClientObject { }
 }
diff --git a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientRuntimeContext.cs b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientRuntimeContext.cs
index 60115fa..eb558ef 100644
--- a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientRuntimeContext.cs
+++ b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IClientRuntimeContext.cs
@@ -1,5 +1,7 @@
+using Speckle.ProxyGenerator;
+
 namespace ProxyInterfaceConsumerForPnP.Interfaces
 {
-    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.ClientRuntimeContext))]
+    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.ClientRuntimeContext), ImplementationOptions.None)]
     public partial interface IClientRuntimeContext { }
 }
diff --git a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IListCollection.cs b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IListCollection.cs
deleted file mode 100644
index ad13290..0000000
--- a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IListCollection.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-//using System.Collections;
-//using System.Linq;
-
-//namespace ProxyInterfaceConsumerForPnP.Interfaces
-//{
-//    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.ListCollection))]
-//    public partial interface IProxyListCollection: IClientObject, IEnumerable, IQueryable
-//    {
-//    }
-//}
diff --git a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/ISecurableObject.cs b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/ISecurableObject.cs
index 06eea32..8810a87 100644
--- a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/ISecurableObject.cs
+++ b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/ISecurableObject.cs
@@ -1,6 +1,8 @@
+using Speckle.ProxyGenerator;
+
 namespace ProxyInterfaceConsumerForPnP.Interfaces
 {
-    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.SecurableObject))]
+    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.SecurableObject), ImplementationOptions.None)]
     public partial interface ISecurableObject : IClientObject
     {
         // public virtual void X();
diff --git a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IUser.cs b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IUser.cs
index e41d282..0ba6d85 100644
--- a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IUser.cs
+++ b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IUser.cs
@@ -1,5 +1,7 @@
+using Speckle.ProxyGenerator;
+
 namespace ProxyInterfaceConsumerForPnP.Interfaces
 {
-    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.User))]
+    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.User), ImplementationOptions.None)]
     public partial interface IUser { }
 }
diff --git a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IWeb.cs b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IWeb.cs
index eab6536..cb3d808 100644
--- a/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IWeb.cs
+++ b/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/IWeb.cs
@@ -1,5 +1,7 @@
+using Speckle.ProxyGenerator;
+
 namespace ProxyInterfaceConsumerForPnP.Interfaces
 {
-    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.Web))]
+    [Speckle.ProxyGenerator.Proxy(typeof(Microsoft.SharePoint.Client.Web), ImplementationOptions.None)]
     public partial interface IWeb : ISecurableObject { }
 }
diff --git a/src-examples/ProxyInterfaceConsumerForPnP/ProxyInterfaceConsumerForPnP.csproj b/src-examples/ProxyInterfaceConsumerForPnP/ProxyInterfaceConsumerForPnP.csproj
index 8972d64..52e066b 100644
--- a/src-examples/ProxyInterfaceConsumerForPnP/ProxyInterfaceConsumerForPnP.csproj
+++ b/src-examples/ProxyInterfaceConsumerForPnP/ProxyInterfaceConsumerForPnP.csproj
@@ -29,9 +29,6 @@
         <Compile Update="Interfaces\IClientObject.cs">
           <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
         </Compile>
-        <Compile Update="Interfaces\IListCollection.cs">
-          <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-        </Compile>
         <Compile Update="Interfaces\IUser.cs">
           <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
         </Compile>
diff --git a/src/Speckle.ProxyGenerator/Speckle.ProxyGenerator.csproj b/src/Speckle.ProxyGenerator/Speckle.ProxyGenerator.csproj
index 2c5ec14..6d853af 100644
--- a/src/Speckle.ProxyGenerator/Speckle.ProxyGenerator.csproj
+++ b/src/Speckle.ProxyGenerator/Speckle.ProxyGenerator.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <Version>0.1.10</Version>
+        <Version>0.1.11</Version>
         <TargetFramework>netstandard2.0</TargetFramework>
         <LangVersion>Latest</LangVersion>
         <Nullable>enable</Nullable>
diff --git a/src/Speckle.ProxyGenerator/SyntaxReceiver/ProxySyntaxReceiver.cs b/src/Speckle.ProxyGenerator/SyntaxReceiver/ProxySyntaxReceiver.cs
index 8c299e5..eb6ca66 100644
--- a/src/Speckle.ProxyGenerator/SyntaxReceiver/ProxySyntaxReceiver.cs
+++ b/src/Speckle.ProxyGenerator/SyntaxReceiver/ProxySyntaxReceiver.cs
@@ -3,6 +3,7 @@ using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Speckle.ProxyGenerator.Extensions;
 using Speckle.ProxyGenerator.Models;
+using Speckle.ProxyGenerator.Types;
 
 namespace Speckle.ProxyGenerator.SyntaxReceiver;
 
@@ -99,7 +100,7 @@ internal class ProxySyntaxReceiver : ISyntaxContextReceiver
             fullMetadataTypeName: metadataName,
             shortMetadataTypeName: metadataName.Split('.').Last(),
             usings: usings,
-            options: fluentBuilderAttributeArguments.Options,
+            options: fluentBuilderAttributeArguments.Options ??  ImplementationOptions.UseExtendedInterfaces | ImplementationOptions.ProxyForBaseInterface,
             accessibility: fluentBuilderAttributeArguments.Accessibility,
             membersToIgnore: fluentBuilderAttributeArguments.MembersToIgnore
         );
diff --git a/src/Speckle.ProxyGenerator/Types/FluentBuilderAttributeArguments.cs b/src/Speckle.ProxyGenerator/Types/FluentBuilderAttributeArguments.cs
index 779704f..beaf38d 100644
--- a/src/Speckle.ProxyGenerator/Types/FluentBuilderAttributeArguments.cs
+++ b/src/Speckle.ProxyGenerator/Types/FluentBuilderAttributeArguments.cs
@@ -5,7 +5,7 @@ internal record ProxyInterfaceGeneratorAttributeArguments(
     string MetadataName
 )
 {
-    public ImplementationOptions Options { get; set; }
+    public ImplementationOptions? Options { get; set; }
 
     public ProxyClassAccessibility Accessibility { get; set; }
     public string[] MembersToIgnore { get; set; } = [];