Well, I definitely don't plan to copy anyone's work in order to make a profit for myself, so I think I'll be OK. Whatever I do make from copying measurements or whatever will just be for myself and my buddies here. Like the 55 gallon drums. I measured a drum on the shop floor for that and gave away quite a few drums, but I seriously doubt I hurt the original manufacturer of the drum I used to get size. It seems to be a very complicated subject, but I'm satisfied I haven't harmed anyone, legally or morally, so I can live with that.