diff --git a/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs b/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
index 0d86815..df3637c 100644
--- a/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
+++ b/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
@@ -215,6 +215,17 @@ namespace Meade.net.Telescope.UnitTests
             Assert.That(exception.Message, Is.EqualTo($"Site {parameters} not allowed, must be between 1 and 4"));
         }
 
+        [Test]
+        public void Action_Site_Count_WhenCalling_ThenReturnsFour()
+        {
+            ConnectTelescope();
+
+            string parameters = "Count";
+            var result = _telescope.Action("site", parameters);
+
+            Assert.That(result, Is.EqualTo("4"));
+        }
+
         [TestCase("1", "#:SMHome#", "Home")]
         [TestCase("2", "#:SNClub#", "Club")]
         [TestCase("3", "#:SOGPS Site#", "GPS Site")]
diff --git a/Meade.net.Telescope/Properties/AssemblyInfo.cs b/Meade.net.Telescope/Properties/AssemblyInfo.cs
index ab1142a..4604c64 100644
--- a/Meade.net.Telescope/Properties/AssemblyInfo.cs
+++ b/Meade.net.Telescope/Properties/AssemblyInfo.cs
@@ -18,7 +18,7 @@ using System.Runtime.InteropServices;
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from 
 // COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(true)]
+[assembly: ComVisible(false)]
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("8b9fccb9-87ae-42f7-90af-079e13de6efb")]
diff --git a/Meade.net.Telescope/Telescope.cs b/Meade.net.Telescope/Telescope.cs
index c77994f..96173de 100644
--- a/Meade.net.Telescope/Telescope.cs
+++ b/Meade.net.Telescope/Telescope.cs
@@ -5,6 +5,8 @@ using System.Collections;
 using System.Globalization;
 using System.Reflection;
 using System.Runtime.InteropServices;
+using System.Text;
+using System.Windows.Forms;
 using ASCOM.Astrometry;
 using ASCOM.Astrometry.AstroUtils;
 using ASCOM.Astrometry.NOVAS;
@@ -35,6 +37,7 @@ namespace ASCOM.Meade.net
     [ProgId("ASCOM.MeadeGeneric.Telescope")]
     [ServedClassName("Meade Generic")]
     [ClassInterface(ClassInterfaceType.None)]
+    [ComVisible(true)]
     public class Telescope : ReferenceCountedObjectBase, ITelescopeV3
     {
         /// <summary>
@@ -78,15 +81,45 @@ namespace ASCOM.Meade.net
         /// </summary>
         public Telescope()
         {
-            //todo move this out to IOC
-            var util = new Util(); //Initialise util object
-            _utilities = util; 
-            _utilitiesExtra = util; //Initialise util object
-            _astroUtilities = new AstroUtils(); // Initialise astro utilities object
-            _sharedResourcesWrapper = new SharedResourcesWrapper();
-            _astroMaths = new AstroMaths.AstroMaths();
+            try
+            {
+                //todo move this out to IOC
+                var util = new Util(); //Initialise util object
+                _utilities = util;
+                _utilitiesExtra = util; //Initialise util object
+                _astroUtilities = new AstroUtils(); // Initialise astro utilities object
+                _sharedResourcesWrapper = new SharedResourcesWrapper();
+                _astroMaths = new AstroMaths.AstroMaths();
 
-            Initialise();
+                Initialise();
+            }
+            catch (Exception e)
+            {
+                StringBuilder sb = new StringBuilder();
+
+                var currentException = e;
+
+                while (currentException != null)
+                {
+                    AppendException(sb, currentException);
+
+                    currentException = currentException.InnerException;
+
+                    if (currentException != null)
+                        sb.AppendLine("-----");
+                }
+
+                MessageBox.Show(sb.ToString());
+                throw;
+            }
+        }
+
+        private void AppendException(StringBuilder sb, Exception currentException)
+        {
+            sb.AppendLine(currentException.Message);
+            sb.AppendLine();
+            sb.AppendLine(currentException.StackTrace);
+            sb.AppendLine();
         }
 
         public Telescope( IUtil util, IUtilExtra utilExtra, IAstroUtils astroUtilities, ISharedResourcesWrapper sharedResourcesWrapper, IAstroMaths astroMaths)
diff --git a/Meade.net.focuser/Focuser.cs b/Meade.net.focuser/Focuser.cs
index 51787bf..e92e611 100644
--- a/Meade.net.focuser/Focuser.cs
+++ b/Meade.net.focuser/Focuser.cs
@@ -30,6 +30,7 @@ namespace ASCOM.Meade.net
     [ProgId("ASCOM.MeadeGeneric.focuser")]
     [ServedClassName("Meade Generic")]
     [ClassInterface(ClassInterfaceType.None)]
+    [ComVisible(true)]
     public class Focuser : ReferenceCountedObjectBase, IFocuserV3
     {
         /// <summary>
diff --git a/Meade.net.focuser/Properties/AssemblyInfo.cs b/Meade.net.focuser/Properties/AssemblyInfo.cs
index 46c7ed0..d77e77d 100644
--- a/Meade.net.focuser/Properties/AssemblyInfo.cs
+++ b/Meade.net.focuser/Properties/AssemblyInfo.cs
@@ -18,7 +18,7 @@ using System.Runtime.InteropServices;
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from 
 // COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(true)]
+[assembly: ComVisible(false)]
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("4ad7a6d4-6d54-4a9a-bbf3-895353e318f8")]
diff --git a/Meade.net/SharedResources.cs b/Meade.net/SharedResources.cs
index 21ae49c..b391c15 100644
--- a/Meade.net/SharedResources.cs
+++ b/Meade.net/SharedResources.cs
@@ -149,7 +149,7 @@ namespace ASCOM.Meade.net
                     driverProfile.DeviceType = "Telescope";
                     driverProfile.WriteValue(DriverId, TraceStateProfileName, profileProperties.TraceLogger.ToString());
                     driverProfile.WriteValue(DriverId, ComPortProfileName, profileProperties.ComPort);
-                    driverProfile.WriteValue(DriverId, GuideRateProfileName, profileProperties.GuideRateArcSecondsPerSecond.ToString(CultureInfo.CurrentCulture));
+                    driverProfile.WriteValue(DriverId, GuideRateProfileName, profileProperties.GuideRateArcSecondsPerSecond.ToString(CultureInfo.InvariantCulture));
                     driverProfile.WriteValue(DriverId, PrecisionProfileName, profileProperties.Precision);
                 }
             }
@@ -170,7 +170,7 @@ namespace ASCOM.Meade.net
                     driverProfile.DeviceType = "Telescope";
                     profileProperties.ComPort = driverProfile.GetValue(DriverId, ComPortProfileName, string.Empty, ComPortDefault);
                     profileProperties.TraceLogger = Convert.ToBoolean(driverProfile.GetValue(DriverId, TraceStateProfileName, string.Empty, TraceStateDefault));
-                    profileProperties.GuideRateArcSecondsPerSecond = double.Parse(driverProfile.GetValue(DriverId, GuideRateProfileName, string.Empty, GuideRateProfileNameDefault));
+                    profileProperties.GuideRateArcSecondsPerSecond = double.Parse(driverProfile.GetValue(DriverId, GuideRateProfileName, string.Empty, GuideRateProfileNameDefault), NumberFormatInfo.InvariantInfo);
                     profileProperties.Precision = driverProfile.GetValue(DriverId, PrecisionProfileName, string.Empty, PrecisionDefault);
                 }