The hammer adjustment is basically a nut threaded in to the hole. I ordered another one from FX for about 13.00. I'm gonna set my hammer pressure then thread the second nut in behind it and snug it down. That should keep it from backing out again.
A Dremel with a sanding drum. I still need to round off the edges before I dip the stock. I want a jam nut to keep mine from backing off too. I've been playing with slugs and ran out of hammer throw. I don't know if someone makes either a heavier hammer or spring as they do for the Crown? I also installed an Huma and started at 150bar. I'm now up to 170bar trying to get the slugs up over 900FPS. Right now they are at 895FPS.