Large ring Mauser lug lapper

This is a remix of my Mauser lug lapper. I've made several improvements to the design. It's now modeled in cad with easy to change parameters so it can easily be adapted to different actions.

This is for a large ring Mauser with a 1.1" 12tpi thread.

The plunger from my original design was very close to the size of a welding tip from a Bernard q-gun. I chose to switch the design to the welding tip so that a metal part that is easily sourced could be used. The rear is also tapered so it helps center the spring. A 5/16" bolt could also be modified to work. The plunger can still be 3d printed.
https://www.amazon.com/10-pk-Welding-Contact-Bernard-Centerfire/dp/B088FPFQ4M/ref=sr_1_1?keywords=bernard+centerfire+tip&qid=1636247065&qsid=146-3924171-3245601&sr=8-1&sres=B088FPFQ4M%2CB004HF66DE%2CB07H1YXCJG%2CB01M11WHON%2CB07H22CKQK%2CB00JDSTW0Y%2CB07D9BQY4K%2CB07F1DQR5Y%2CB001AIULYG%2CB002ORB2G8%2CB07FY5KCFK%2CB07THWMZ7R%2CB07F1KG6RS%2CB07F1CMT43%2CB07BLQFQNN%2CB005FTPZSS%2CB003GM9Q1S%2CB