Many of the ad of watches for sale say something to the order of: "watch is in pristine condition except for scratches on lugs from strap changes". I have changed quite a few straps/bracelets and have yet to scratch a lug. Even with minimal room between the strap and the lug the area which may suffer damage is the spring bar as that should be the object of the spring bar tool. Can someone tell me how, if you are attempting to compress a spring bar, which is nowhere near the external surface of the lug, the lug gets scratched. Are we talking "klutz"?