I just created a iPart that I can switch between Satin Anodized Aluminum and Black Anodized Aluminum that has a custom Length collumn. The parts we order come in 5000 mm Lengths. The Length in the iPart is set to a start Length of 12". When I place this into a iAssembly I change the Length to lets say, 24-1/8" and I may have 3 instances of the same part. However when I swap between the Satin Anodized Aluminum and Black Aluminum the Length in the iAssembly wants to go back to 12" rather than the 24-1/8" that I need.