Modified the implementation of side of pier support detection. Hopefully will now,

Added extra checking to ensure that a slew cannot be started whilst a slew is in progress.

Meade.net/TelescopeList.cs

@@ -23,6 +23,7 @@
         // ReSharper disable once InconsistentNaming
         public const string LX200GPS = "LX2001";
 
+        public const string LX200GPS_42F = "4.2F";
         // ReSharper disable once InconsistentNaming
         public const string LX200GPS_42G = "4.2G";
         #endregion

Meade.net/Wrapper/SharedResourcesWrapper.cs

@@ -12,10 +12,7 @@ namespace ASCOM.Meade.net.Wrapper
         string ProductName { get; }
 
         string FirmwareVersion { get; }
-
-        void Lock(Action action);
-        T Lock<T>(Func<T> func);
-
+        
         string SendString(string message, bool raw = false);
         void SendBlind(string message, bool raw = false);
         bool SendBool(string command, bool raw = false);
@@ -69,16 +66,6 @@ namespace ASCOM.Meade.net.Wrapper
 
         public string FirmwareVersion => SharedResources.FirmwareVersion;
 
-        public void Lock(Action action)
-        {
-            SharedResources.Lock(action);
-        }
-
-        public T Lock<T>(Func<T> func)
-        {
-            return SharedResources.Lock(func);
-        }
-
         public string SendString(string message, bool raw = false)
         {
             return SharedResources.SendString(message, raw);