diff --git a/BizHawk.Client.Common/lua/EmuLuaLibrary.Emu.cs b/BizHawk.Client.Common/lua/EmuLuaLibrary.Emu.cs
index 664285a98b..9f39bd6839 100644
--- a/BizHawk.Client.Common/lua/EmuLuaLibrary.Emu.cs
+++ b/BizHawk.Client.Common/lua/EmuLuaLibrary.Emu.cs
@@ -152,7 +152,7 @@ namespace BizHawk.Client.Common
 		{
 			if (Global.Emulator.CanPollInput())
 			{
-				return (Global.Emulator as IInputPollable).IsLagFrame;
+				return Global.Emulator.AsInputPollable().IsLagFrame;
 			}
 			else
 			{
@@ -169,7 +169,7 @@ namespace BizHawk.Client.Common
 		{
 			if (Global.Emulator.CanPollInput())
 			{
-				return (Global.Emulator as IInputPollable).LagCount;
+				return Global.Emulator.AsInputPollable().LagCount;
 			}
 			else
 			{
diff --git a/BizHawk.Client.Common/lua/EmuLuaLibrary.Events.cs b/BizHawk.Client.Common/lua/EmuLuaLibrary.Events.cs
index 0d968f100c..4c54375caa 100644
--- a/BizHawk.Client.Common/lua/EmuLuaLibrary.Events.cs
+++ b/BizHawk.Client.Common/lua/EmuLuaLibrary.Events.cs
@@ -161,7 +161,7 @@ namespace BizHawk.Client.Common
 			{
 				try
 				{
-					(Global.Emulator as IInputPollable).InputCallbacks.Add(nlf.Callback);
+					Global.Emulator.AsInputPollable().InputCallbacks.Add(nlf.Callback);
 				}
 				catch (NotImplementedException)
 				{
diff --git a/BizHawk.Client.Common/lua/LuaFunctionList.cs b/BizHawk.Client.Common/lua/LuaFunctionList.cs
index d7bce3c587..1f9dea9b43 100644
--- a/BizHawk.Client.Common/lua/LuaFunctionList.cs
+++ b/BizHawk.Client.Common/lua/LuaFunctionList.cs
@@ -20,7 +20,7 @@ namespace BizHawk.Client.Common
 		{
 			if (Global.Emulator.CanPollInput())
 			{
-				(Global.Emulator as IInputPollable).InputCallbacks.Remove(function.Callback);
+				Global.Emulator.AsInputPollable().InputCallbacks.Remove(function.Callback);
 			}
 
 			Global.Emulator.CoreComm.MemoryCallbackSystem.Remove(function.Callback);
@@ -31,7 +31,7 @@ namespace BizHawk.Client.Common
 		{
 			if (Global.Emulator.CanPollInput())
 			{
-				(Global.Emulator as IInputPollable).InputCallbacks.RemoveAll(this.Select(x => x.Callback));
+				Global.Emulator.AsInputPollable().InputCallbacks.RemoveAll(this.Select(x => x.Callback));
 			}
 
 			Global.Emulator.CoreComm.MemoryCallbackSystem.RemoveAll(this.Select(x => x.Callback));
diff --git a/BizHawk.Client.Common/movie/tasproj/TasLagLog.cs b/BizHawk.Client.Common/movie/tasproj/TasLagLog.cs
index 2496ef097f..889affa8d7 100644
--- a/BizHawk.Client.Common/movie/tasproj/TasLagLog.cs
+++ b/BizHawk.Client.Common/movie/tasproj/TasLagLog.cs
@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 
-using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 
 namespace BizHawk.Client.Common
 {
@@ -23,10 +23,10 @@ namespace BizHawk.Client.Common
 				{
 					if (frame == LagLog.Count)
 					{
-						LagLog[frame] = (Global.Emulator as IInputPollable).IsLagFrame; // Note: Side effects!
+						LagLog[frame] = Global.Emulator.AsInputPollable().IsLagFrame; // Note: Side effects!
 					}
 
-					return (Global.Emulator as IInputPollable).IsLagFrame;
+					return Global.Emulator.AsInputPollable().IsLagFrame;
 				}
 
 				return null;
diff --git a/BizHawk.Client.Common/movie/tasproj/TasMovie.Editing.cs b/BizHawk.Client.Common/movie/tasproj/TasMovie.Editing.cs
index 4b9c5e3a64..58d6d36c4d 100644
--- a/BizHawk.Client.Common/movie/tasproj/TasMovie.Editing.cs
+++ b/BizHawk.Client.Common/movie/tasproj/TasMovie.Editing.cs
@@ -5,6 +5,7 @@ using System.Linq;
 
 using BizHawk.Common;
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 
 namespace BizHawk.Client.Common
 {
@@ -15,7 +16,7 @@ namespace BizHawk.Client.Common
 			base.RecordFrame(frame, source);
 
 			LagLog.RemoveFrom(frame);
-			LagLog[frame] = (Global.Emulator as IInputPollable).IsLagFrame;
+			LagLog[frame] = Global.Emulator.AsInputPollable().IsLagFrame;
 
 			StateManager.Capture();
 		}
diff --git a/BizHawk.Client.Common/movie/tasproj/TasMovie.cs b/BizHawk.Client.Common/movie/tasproj/TasMovie.cs
index c6c06aa198..aad9358588 100644
--- a/BizHawk.Client.Common/movie/tasproj/TasMovie.cs
+++ b/BizHawk.Client.Common/movie/tasproj/TasMovie.cs
@@ -306,7 +306,7 @@ namespace BizHawk.Client.Common
 		{
 			if (frame == Global.Emulator.Frame) // Take this opportunity to capture lag and state info if we do not have it
 			{
-				LagLog[Global.Emulator.Frame] = (Global.Emulator as IInputPollable).IsLagFrame;
+				LagLog[Global.Emulator.Frame] = Global.Emulator.AsInputPollable().IsLagFrame;
 
 				if (!StateManager.HasState(frame))
 				{
diff --git a/BizHawk.Client.EmuHawk/DisplayManager/OSDManager.cs b/BizHawk.Client.EmuHawk/DisplayManager/OSDManager.cs
index 70fb6b4586..394ba1bf27 100644
--- a/BizHawk.Client.EmuHawk/DisplayManager/OSDManager.cs
+++ b/BizHawk.Client.EmuHawk/DisplayManager/OSDManager.cs
@@ -390,7 +390,7 @@ namespace BizHawk.Client.EmuHawk
 
 			if (Global.Config.DisplayLagCounter && Global.Emulator.CanPollInput())
 			{
-				var counter = (Global.Emulator as IInputPollable).LagCount.ToString();
+				var counter = Global.Emulator.AsInputPollable().LagCount.ToString();
 				var x = GetX(g, Global.Config.DispLagx, Global.Config.DispLaganchor, counter);
 				var y = GetY(g, Global.Config.DispLagy, Global.Config.DispLaganchor, counter);
 
diff --git a/BizHawk.Client.EmuHawk/MainForm.cs b/BizHawk.Client.EmuHawk/MainForm.cs
index c2edcaf54d..e23b609ac2 100644
--- a/BizHawk.Client.EmuHawk/MainForm.cs
+++ b/BizHawk.Client.EmuHawk/MainForm.cs
@@ -2651,7 +2651,7 @@ namespace BizHawk.Client.EmuHawk
 			{
 				if (Global.Emulator.CanPollInput())
 				{
-					return (Global.Emulator as IInputPollable).IsLagFrame;
+					return Global.Emulator.AsInputPollable().IsLagFrame;
 				}
 
 				return false;
diff --git a/BizHawk.Client.EmuHawk/tools/BatchRunner.cs b/BizHawk.Client.EmuHawk/tools/BatchRunner.cs
index a238f3d582..5f3409b378 100644
--- a/BizHawk.Client.EmuHawk/tools/BatchRunner.cs
+++ b/BizHawk.Client.EmuHawk/tools/BatchRunner.cs
@@ -183,7 +183,7 @@ namespace BizHawk.Client.EmuHawk
 						// some cores really really really like it if you drain their audio every frame
 						emu.SyncSoundProvider.GetSamples(out samp, out nsamp);
 						current.Frames++;
-						if (emu.CanPollInput() && (emu as IInputPollable).IsLagFrame)
+						if (emu.CanPollInput() && emu.AsInputPollable().IsLagFrame)
 							current.LaggedFrames++;
 					}
 					catch (Exception e)
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/N64/N64.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/N64/N64.cs
index f554799e8e..bbc026730f 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/N64/N64.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/N64/N64.cs
@@ -5,6 +5,7 @@ using System.IO;
 
 using BizHawk.Common.BufferExtensions;
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 using BizHawk.Emulation.Cores.Nintendo.N64.NativeApi;
 
 namespace BizHawk.Emulation.Cores.Nintendo.N64
@@ -123,7 +124,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.N64
 			// Order is important because the register with the mupen core
 			_videoProvider = new N64VideoProvider(api, videosettings);
 			_audioProvider = new N64Audio(api);
-			_inputProvider = new N64Input(this as IInputPollable, api, comm, this._syncSettings.Controllers);
+			_inputProvider = new N64Input(this.AsInputPollable(), api, comm, this._syncSettings.Controllers);
 
 
 			string rsp = _syncSettings.Rsp == N64SyncSettings.RspType.Rsp_Hle ?