Removed seperate plugins project since you're always referencing both..

Added more loading logic

src/Artemis.Core/Services/Interfaces/IMainDataModelService.cs

@@ -1,5 +1,5 @@
 using Artemis.Core.Models;
-using Artemis.Plugins.Interfaces;
+using Artemis.Core.Plugins.Interfaces;
 
 namespace Artemis.Core.Services.Interfaces
 {

src/Artemis.Core/Services/Interfaces/IPluginService.cs

@@ -2,8 +2,9 @@
 using System.Collections.ObjectModel;
 using System.Threading.Tasks;
 using Artemis.Core.Events;
-using Artemis.Plugins.Interfaces;
-using Artemis.Plugins.Models;
+using Artemis.Core.Plugins.Interfaces;
+using Artemis.Core.Plugins.Models;
+using Artemis.Core.ProfileElements;
 
 namespace Artemis.Core.Services.Interfaces
 {
@@ -55,5 +56,12 @@ namespace Artemis.Core.Services.Interfaces
         ///     Occurs when loading all plugins has finished
         /// </summary>
         event EventHandler FinishedLoadedPlugins;
+
+        /// <summary>
+        ///     If found, returns an instance of the layer type matching the given GUID
+        /// </summary>
+        /// <param name="layerTypeGuid">The GUID of the layer type to find</param>
+        /// <returns>An instance of the layer type</returns>
+        ILayerType GetLayerTypeByGuid(Guid layerTypeGuid);
     }
 }