I did not open your part (I'm still running 2010, so I probably can't, but I don't really have the time anyway). What kind of problem are you having? What are you trying to do? Are you trying to show your part after it has been plated or painted? Do you want to have two separate parts or two bodies in the same part, or is it OK if the part just gets bigger by 0.2 mm in all directions?