So I don't want to wait for several hundred to a thousand dry fires to find areas where there may be extra wear or contact in the action of my 75's. An example is my SP-01. Over time I have come to find the hammer is rubbing a great deal on the frame due to some tolerance stacking. One indication was some very strong wear marks on the hammer, more so than I normally see. I know the general points of contact to polish. This question is specifically what methods or tips do you all have/use to find out if areas are experiencing higher interfacing/wear than others? Do you do some initial polishing with lower grit to expose the metal, then hit it with some marker, put it back in place, work the action, and see were the marker wears? That is all I can think of, but I know you all have a ton of experience and have paved the road for us young bucks. Thanks ya'll for any and all help!