FWIW I had a bunch of H molds hot stamped by CGraham years ago. He did a great job but told me the chips really needed to be scraped. I figured I’d do it myself, of course I never did. There is some wobble in stacks of these chips to this day, and I think much of the wobble is due to the excess clay and foil from the deep stamps. I also think deep stamping can cause spinners and slightly warp chips due to the pressure. I suspect this has happened to some of mine as well. But the H mold along with many old molds come with imperfections right out of the press I think. Maybe that is why ASM/CPC always leaned towards hot stamping the newer A mold that I think has a built in recess.