Resizing?

[grayfox]

I put a single hash mark on the die threads (with a sharpie or a cool vinyl "paint" pen, then a few match marks on the ring, for about 45, 15 and ~5 deg rotation... like Dino says a little goes a long way. It's a 7/8-14 thread, so one turn, 360 deg= 1/14", or 0.072". 5 deg is then ~~0.001", 15 is 0.003. You can usually do a careful eyeball for 90, then 45, then 15 deg or so.
Not sure where my feeler gages are any more, probably lost in 1 of my many moves, lol!!!