Agris grinding jigs

I like to make a jig for every caliber I reload because they work so much better than grinding a peg hole. I like to use 1 inch plastic cutting boards because they are easy to find and very easy to grind on, so far I've found a hard plastic cutting board to be virtually indestructible with the only drawback being how hot they can get before you need to take a break. Here are the calibers I've done so far.