diff --git a/src/Umbraco.Core/Models/PropertyType.cs b/src/Umbraco.Core/Models/PropertyType.cs
index 5bf96d2578..4aab35c805 100644
--- a/src/Umbraco.Core/Models/PropertyType.cs
+++ b/src/Umbraco.Core/Models/PropertyType.cs
@@ -38,11 +38,21 @@ namespace Umbraco.Core.Models
             _propertyEditorAlias = dataTypeDefinition.PropertyEditorAlias;
             _dataTypeDatabaseType = dataTypeDefinition.DatabaseType;
         }
+
+        public PropertyType(IDataTypeDefinition dataTypeDefinition, string propertyTypeAlias)
+            : this(dataTypeDefinition)
+        {
+            SetAlias(propertyTypeAlias);
+        }
         
-        internal PropertyType(string propertyEditorAlias, DataTypeDatabaseType dataTypeDatabaseType)
+        public PropertyType(string propertyEditorAlias, DataTypeDatabaseType dataTypeDatabaseType)
             : this(propertyEditorAlias, dataTypeDatabaseType, false)
         {
-            PropertyEditorAlias = propertyEditorAlias;
+        }
+
+        public PropertyType(string propertyEditorAlias, DataTypeDatabaseType dataTypeDatabaseType, string propertyTypeAlias)
+            : this(propertyEditorAlias, dataTypeDatabaseType, false, propertyTypeAlias)
+        {           
         }
 
         /// <summary>
@@ -58,6 +68,21 @@ namespace Umbraco.Core.Models
             _dataTypeDatabaseType = dataTypeDatabaseType;
         }
 
+        /// <summary>
+        /// Used internally to assign an explicity database type for this property type regardless of what the underlying data type/property editor is.
+        /// </summary>
+        /// <param name="propertyEditorAlias"></param>
+        /// <param name="dataTypeDatabaseType"></param>
+        /// <param name="isExplicitDbType"></param>
+        /// <param name="propertyTypeAlias"></param>
+        internal PropertyType(string propertyEditorAlias, DataTypeDatabaseType dataTypeDatabaseType, bool isExplicitDbType, string propertyTypeAlias)
+        {
+            _isExplicitDbType = isExplicitDbType;
+            _propertyEditorAlias = propertyEditorAlias;
+            _dataTypeDatabaseType = dataTypeDatabaseType;
+            SetAlias(propertyTypeAlias);
+        }
+
         private static readonly PropertyInfo NameSelector = ExpressionHelper.GetPropertyInfo<PropertyType, string>(x => x.Name);
         private static readonly PropertyInfo AliasSelector = ExpressionHelper.GetPropertyInfo<PropertyType, string>(x => x.Alias);
         private static readonly PropertyInfo DescriptionSelector = ExpressionHelper.GetPropertyInfo<PropertyType, string>(x => x.Description);
@@ -96,15 +121,9 @@ namespace Umbraco.Core.Models
             get { return _alias; }
             set
             {
-                //NOTE: WE are doing this because we don't want to do a ToSafeAlias when the alias is the special case of
-                // being prefixed with Constants.PropertyEditors.InternalGenericPropertiesPrefix
-                // which is used internally
-
                 SetPropertyValueAndDetectChanges(o =>
                 {
-                    _alias = value.StartsWith(Constants.PropertyEditors.InternalGenericPropertiesPrefix)
-                        ? value 
-                        : value.ToCleanString(CleanStringType.Alias | CleanStringType.UmbracoCase);
+                    SetAlias(value);
                     return _alias;
                 }, _alias, AliasSelector);
             }
@@ -284,6 +303,17 @@ namespace Umbraco.Core.Models
             }
         }
 
+        private void SetAlias(string value)
+        {
+            //NOTE: WE are doing this because we don't want to do a ToSafeAlias when the alias is the special case of
+            // being prefixed with Constants.PropertyEditors.InternalGenericPropertiesPrefix
+            // which is used internally
+
+            _alias = value.StartsWith(Constants.PropertyEditors.InternalGenericPropertiesPrefix)
+                        ? value
+                        : value.ToCleanString(CleanStringType.Alias | CleanStringType.UmbracoCase);
+        }
+
         /// <summary>
         /// Create a new Property object from a "raw" database value.
         /// </summary>
@@ -431,26 +461,22 @@ namespace Umbraco.Core.Models
 
         public bool Equals(PropertyType other)
         {
-            //Check whether the compared object is null. 
-            if (ReferenceEquals(other, null)) return false;
-
-            //Check whether the compared object references the same data. 
-            if (ReferenceEquals(this, other)) return true;
+            if (base.Equals(other)) return true;
 
             //Check whether the PropertyType's properties are equal. 
-            return Alias.Equals(other.Alias) && Name.Equals(other.Name);
+            return Alias.InvariantEquals(other.Alias);
         }
 
         public override int GetHashCode()
         {
             //Get hash code for the Name field if it is not null. 
-            int hashName = Name == null ? 0 : Name.GetHashCode();
+            int baseHash = base.GetHashCode();
 
             //Get hash code for the Alias field. 
-            int hashAlias = Alias.GetHashCode();
+            int hashAlias = Alias.ToLowerInvariant().GetHashCode();
 
             //Calculate the hash code for the product. 
-            return hashName ^ hashAlias;
+            return baseHash ^ hashAlias;
         }
 
         public override object DeepClone()