There you go. You got the kernel sizing down pat as the grading to F size doesn't need to be exact.
As far as a pressing die. I'll P/m you the place where most of us home powder makers bought ours. The fellows Pressing Die is machined aluminum >so it is nice. Just a idea. You could ask the maker: How's about a machine mark on the outside wall to indicate correct volume of filling? i.e. so to not make your pucks too thick. Dried pucks are a bit difficult in their breaking up so to grind. Extra thick pucks wiil form a line of sweat on your brow.