I am trying to turn some external metric threads that will later be coated with a plating thickness of .001". Machinery's handbook says that for 60 degree threads, the change in pitch diameter is 4x the plating thickness. I will be using a sharp "v" style threading tool to make the thread. My understanding is that to make the threads correctly so that it gages after plating, I would have to reduce the major diameter by .002" and the thread depth by .004". Is this right?