I know I am not the only one that likes to make tools, over the years I have come up with a few that have worked for me.
Nothing fancy just functional.
like the 12 gauge barrel dent removing tool made from about $10 worth of tubing, all thread and bicycle handlebar clamps.
Hockey puck bench blocks for driving out pins and 2 clamped in a vice holds barrels very nicely.
For checking chamber length in older double shotguns I use a old cut down shell with a wooden dowel glued in the front half, then slid through the primer hole. the dowel is marked at 2 3/4"
so what special tricks or tools have you made that you can share, I know I am not the only gun and tool nut out there.