I really like the die punch, something definitely worth considering fabricating. I'm going to take a shot at the nickel plated brass washers (size 6,8, and 10) on ebay. They are relatively cheap per 100 and since I've messed with electrolysis plating removal before, I'm not too worried about the process to strip the plating. I imagine I'll have to experiment one washer at a time until I get it perfected. I"ll post the results in a few weeks.