diff --git a/PepperDashEssentials/Room/Types/EssentialsDualDisplayRoom.cs b/PepperDashEssentials/Room/Types/EssentialsDualDisplayRoom.cs
index 2cfb33f7..54a84d28 100644
--- a/PepperDashEssentials/Room/Types/EssentialsDualDisplayRoom.cs
+++ b/PepperDashEssentials/Room/Types/EssentialsDualDisplayRoom.cs
@@ -1,14 +1,11 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 using Crestron.SimplSharp;
 
 using Newtonsoft.Json;
 
 using PepperDash.Core;
 using PepperDash.Essentials.Core;
-using PepperDash.Essentials.Core.Devices;
 using PepperDash.Essentials.Core.Config;
 using PepperDash.Essentials.Room.Config;
 using PepperDash.Essentials.Devices.Common.Codec;
@@ -77,9 +74,8 @@ namespace PepperDash.Essentials
                     var leftDisp = LeftDisplay as DisplayBase;
                     var rightDisp = RightDisplay as DisplayBase;
                     if (leftDisp != null && RightDisplay != null)
-                        return leftDisp.IsWarmingUpFeedback.BoolValue || rightDisp.IsWarmingUpFeedback.BoolValue;
-                    else
-                        return false;
+                        return rightDisp != null && (leftDisp.IsWarmingUpFeedback.BoolValue || rightDisp.IsWarmingUpFeedback.BoolValue);
+                    return false;
                 };
             }
         }
@@ -96,9 +92,8 @@ namespace PepperDash.Essentials
                     var leftDisp = LeftDisplay as DisplayBase;
                     var rightDisp = RightDisplay as DisplayBase;
                     if (leftDisp != null && RightDisplay != null)
-                        return leftDisp.IsCoolingDownFeedback.BoolValue || rightDisp.IsCoolingDownFeedback.BoolValue;
-                    else
-                        return false;
+                        return rightDisp != null && (leftDisp.IsCoolingDownFeedback.BoolValue || rightDisp.IsCoolingDownFeedback.BoolValue);
+                    return false;
                 };
             }
         }
@@ -120,7 +115,7 @@ namespace PepperDash.Essentials
         /// If room is off, enables power on to last source. Default true
         /// </summary>
         public bool EnablePowerOnToLastSource { get; set; }
-        string LastSourceKey;
+        string _lastSourceKey;
 
         /// <summary>
         /// Sets the volume control device, and attaches/removes InUseTrackers with "audio"
@@ -128,27 +123,27 @@ namespace PepperDash.Essentials
         /// </summary>
         public IBasicVolumeControls CurrentVolumeControls
         {
-            get { return _CurrentAudioDevice; }
+            get { return _currentAudioDevice; }
             set
             {
-                if (value == _CurrentAudioDevice) return;
+                if (value == _currentAudioDevice) return;
 
-                var oldDev = _CurrentAudioDevice;
+                var oldDev = _currentAudioDevice;
                 // derigister this room from the device, if it can
                 if (oldDev is IInUseTracking)
                     (oldDev as IInUseTracking).InUseTracker.RemoveUser(this, "audio");
                 var handler = CurrentVolumeDeviceChange;
                 if (handler != null)
                     CurrentVolumeDeviceChange(this, new VolumeDeviceChangeEventArgs(oldDev, value, ChangeType.WillChange));
-                _CurrentAudioDevice = value;
+                _currentAudioDevice = value;
                 if (handler != null)
                     CurrentVolumeDeviceChange(this, new VolumeDeviceChangeEventArgs(oldDev, value, ChangeType.DidChange));
                 // register this room with new device, if it can
-                if (_CurrentAudioDevice is IInUseTracking)
-                    (_CurrentAudioDevice as IInUseTracking).InUseTracker.AddUser(this, "audio");
+                if (_currentAudioDevice is IInUseTracking)
+                    (_currentAudioDevice as IInUseTracking).InUseTracker.AddUser(this, "audio");
             }
         }
-        IBasicVolumeControls _CurrentAudioDevice;
+        IBasicVolumeControls _currentAudioDevice;
 
         /// <summary>
         /// "codecOsd"
@@ -161,7 +156,7 @@ namespace PepperDash.Essentials
         /// </summary>
         public IHasScheduleAwareness ScheduleSource { get { return VideoCodec as IHasScheduleAwareness; } }
 
-        CCriticalSection SourceSelectLock = new CCriticalSection();
+        readonly CCriticalSection _sourceSelectLock = new CCriticalSection();
 
         public EssentialsDualDisplayRoom(DeviceConfig config)
             : base(config)
@@ -196,12 +191,12 @@ namespace PepperDash.Essentials
                 }
 
                 VideoCodec = DeviceManager.GetDeviceForKey(PropertiesConfig.VideoCodecKey) as
-                   PepperDash.Essentials.Devices.Common.VideoCodec.VideoCodecBase;
+                   VideoCodecBase;
                 if (VideoCodec == null)
                     throw new ArgumentNullException("codec cannot be null");
 
                 AudioCodec = DeviceManager.GetDeviceForKey(PropertiesConfig.AudioCodecKey) as
-                    PepperDash.Essentials.Devices.Common.AudioCodec.AudioCodecBase;
+                    AudioCodecBase;
                 if (AudioCodec == null)
                     Debug.Console(0, this, "No Audio Codec Found");
 
@@ -217,8 +212,8 @@ namespace PepperDash.Essentials
 
         void Initialize()
         {
-            if (DefaultAudioDevice is IBasicVolumeControls)
-                DefaultVolumeControls = DefaultAudioDevice as IBasicVolumeControls;
+            if (DefaultAudioDevice != null)
+                DefaultVolumeControls = DefaultAudioDevice;
             else if (DefaultAudioDevice is IHasVolumeDevice)
                 DefaultVolumeControls = (DefaultAudioDevice as IHasVolumeDevice).VolumeDevice;
             CurrentVolumeControls = DefaultVolumeControls;
@@ -233,12 +228,12 @@ namespace PepperDash.Essentials
                 InitializeDisplay(rightDisp);
 
             // Get Microphone Privacy object, if any
-            this.MicrophonePrivacy = EssentialsRoomConfigHelper.GetMicrophonePrivacy(PropertiesConfig, this);
+            MicrophonePrivacy = EssentialsRoomConfigHelper.GetMicrophonePrivacy(PropertiesConfig, this);
 
             Debug.Console(2, this, "Microphone Privacy Config evaluated.");
 
             // Get emergency object, if any
-            this.Emergency = EssentialsRoomConfigHelper.GetEmergency(PropertiesConfig, this);
+            Emergency = EssentialsRoomConfigHelper.GetEmergency(PropertiesConfig, this);
 
             Debug.Console(2, this, "Emergency Config evaluated.");
 
@@ -254,23 +249,20 @@ namespace PepperDash.Essentials
                 if (VideoCodec != null)
                     inVideoCall = VideoCodec.IsInCall;
 
-                if (inAudioCall || inVideoCall)
-                    return true;
-                else
-                    return false;
+                return inAudioCall || inVideoCall;
             });
 
-            VideoCodec.CallStatusChange += (o, a) => this.InCallFeedback.FireUpdate();
+            VideoCodec.CallStatusChange += (o, a) => InCallFeedback.FireUpdate();
 
             if (AudioCodec != null)
-                AudioCodec.CallStatusChange += (o, a) => this.InCallFeedback.FireUpdate();
+                AudioCodec.CallStatusChange += (o, a) => InCallFeedback.FireUpdate();
 
             IsSharingFeedback = new BoolFeedback(() => VideoCodec.SharingContentIsOnFeedback.BoolValue);
-            VideoCodec.SharingContentIsOnFeedback.OutputChange += (o, a) => this.IsSharingFeedback.FireUpdate();
+            VideoCodec.SharingContentIsOnFeedback.OutputChange += (o, a) => IsSharingFeedback.FireUpdate();
 
             // link privacy to VC (for now?)
             PrivacyModeIsOnFeedback = new BoolFeedback(() => VideoCodec.PrivacyModeIsOnFeedback.BoolValue);
-            VideoCodec.PrivacyModeIsOnFeedback.OutputChange += (o, a) => this.PrivacyModeIsOnFeedback.FireUpdate();
+            VideoCodec.PrivacyModeIsOnFeedback.OutputChange += (o, a) => PrivacyModeIsOnFeedback.FireUpdate();
 
             CallTypeFeedback = new IntFeedback(() => 0);
 
@@ -304,13 +296,18 @@ namespace PepperDash.Essentials
                 disp.IsWarmingUpFeedback.OutputChange += (o, a) =>
                 {
                     IsWarmingUpFeedback.FireUpdate();
-                    if (!IsWarmingUpFeedback.BoolValue)
-                        (CurrentVolumeControls as IBasicVolumeWithFeedback).SetVolume(DefaultVolume);
-                };
-                disp.IsCoolingDownFeedback.OutputChange += (o, a) =>
-                {
-                    IsCoolingDownFeedback.FireUpdate();
+                    if (IsWarmingUpFeedback.BoolValue)
+                    {
+                        return;
+                    }
+
+                    var basicVolumeWithFeedback = CurrentVolumeControls as IBasicVolumeWithFeedback;
+                    if (basicVolumeWithFeedback != null)
+                    {
+                        basicVolumeWithFeedback.SetVolume(DefaultVolume);
+                    }
                 };
+                disp.IsCoolingDownFeedback.OutputChange += (o, a) => IsCoolingDownFeedback.FireUpdate();
             }
         }
 
@@ -328,7 +325,7 @@ namespace PepperDash.Essentials
         {
             // Add Occupancy object from config
             if (PropertiesConfig.Occupancy != null)
-                this.SetRoomOccupancy(DeviceManager.GetDeviceForKey(PropertiesConfig.Occupancy.DeviceKey) as
+                SetRoomOccupancy(DeviceManager.GetDeviceForKey(PropertiesConfig.Occupancy.DeviceKey) as
                     IOccupancyStatusProvider, PropertiesConfig.Occupancy.TimeoutMinutes);
 
             this.LogoUrlLightBkgnd = PropertiesConfig.LogoLight.GetLogoUrlLight();
@@ -381,6 +378,7 @@ namespace PepperDash.Essentials
         /// 
         /// </summary>
         /// <param name="routeKey"></param>
+        /// <param name="sourceListKey"></param>
         public void RunRouteAction(string routeKey, string sourceListKey)
         {
             RunRouteAction(routeKey,  sourceListKey, null);
@@ -390,14 +388,17 @@ namespace PepperDash.Essentials
         /// Gets a source from config list SourceListKey and dynamically build and executes the
         /// route or commands
         /// </summary>
-        /// <param name="name"></param>
+        /// <param name="routeKey"></param>
+        /// <param name="sourceListKey"></param>
+        /// <param name="successCallback"></param>
         public void RunRouteAction(string routeKey, string sourceListKey, Action successCallback)
         {
             // Run this on a separate thread
-            new CTimer(o =>
+            //new CTimer
+            CrestronInvoke.BeginInvoke(o =>
             {
                 // try to prevent multiple simultaneous selections
-                SourceSelectLock.TryEnter();
+                _sourceSelectLock.TryEnter();
 
                 try
                 {
@@ -419,9 +420,9 @@ namespace PepperDash.Essentials
                     }
 
                     // End usage timer on last source
-                    if (!string.IsNullOrEmpty(LastSourceKey))
+                    if (!string.IsNullOrEmpty(_lastSourceKey))
                     {
-                        var usageLastSource = dict[LastSourceKey].SourceDevice as IUsageTracking;
+                        var usageLastSource = dict[_lastSourceKey].SourceDevice as IUsageTracking;
                         if (usageLastSource != null && usageLastSource.UsageTracker != null)
                         {
                             try
@@ -441,7 +442,7 @@ namespace PepperDash.Essentials
                     if (routeKey.ToLower() != "roomoff")
                     {
 
-                        LastSourceKey = routeKey;
+                        _lastSourceKey = routeKey;
                     }
                     //else
                     //    CurrentSourceInfoKey = null;
@@ -526,7 +527,7 @@ namespace PepperDash.Essentials
                     Debug.Console(1, this, "ERROR in routing: {0}", e);
                 }
 
-                SourceSelectLock.Leave();
+                _sourceSelectLock.Leave();
             }, 0); // end of CTimer
         }
 
@@ -535,6 +536,8 @@ namespace PepperDash.Essentials
         /// 
         /// </summary>
         /// <param name="route"></param>
+        /// <param name="sourceItem"></param>
+        /// <param name="sourceItemKey"></param>
         void DoRouteItem(SourceRouteListItem route, SourceListItem sourceItem, string sourceItemKey)
         {
             // if there is a $defaultAll on route, run two separate
@@ -558,7 +561,7 @@ namespace PepperDash.Essentials
         /// </summary>
         /// <param name="route"></param>
         /// <returns></returns>
-        bool DoRoute(SourceRouteListItem route, SourceListItem sourceItem, string sourceItemKey)
+        private bool DoRoute(SourceRouteListItem route, SourceListItem sourceItem, string sourceItemKey)
         {
             IRoutingSink dest = null;
 
@@ -622,9 +625,9 @@ namespace PepperDash.Essentials
         /// </summary>
         public override void PowerOnToDefaultOrLastSource()
         {
-            if (!EnablePowerOnToLastSource || LastSourceKey == null)
+            if (!EnablePowerOnToLastSource || _lastSourceKey == null)
                 return;
-            RunRouteAction(LastSourceKey, SourceListKey);
+            RunRouteAction(_lastSourceKey, SourceListKey);
         }
 
         /// <summary>
@@ -632,10 +635,13 @@ namespace PepperDash.Essentials
         /// </summary>
         public static void AllRoomsOff()
         {
-            var allRooms = DeviceManager.AllDevices.Where(d =>
-                d is EssentialsHuddleSpaceRoom && !(d as EssentialsHuddleSpaceRoom).ExcludeFromGlobalFunctions);
+            var allRooms = DeviceManager.AllDevices.OfType<EssentialsHuddleSpaceRoom>().Where(d => !d.ExcludeFromGlobalFunctions);
             foreach (var room in allRooms)
-                (room as EssentialsHuddleSpaceRoom).RunRouteAction("roomOff", (room as EssentialsHuddleSpaceRoom).SourceListKey);
+            {
+
+                room.RunRouteAction("roomOff", room.SourceListKey);
+
+            }
         }
 
         #region IPrivacy Members