Maybe this has already been suggested, but here goes.. I just got my Pat Marlin gas check maker. Started punching out Aluminum gas check discs and found it to be a bit of a pain as they tend to fly out of the top of the die. So I took an empty (make sure it's empty and dry LOL ) water bottle and the mouth fit perfectly over the top of the die. Now I can punch out discs all day and not loose any. I also attached the die to one of Hornady's lock and load gizmos so when I'm done. I just take out the die and thethe bottle stays with it, turn it over and take the bottle off the die. Then pour out the discs ready to be made into gas checks..
If you need pictures let me know but I think it's pretty simple..
Jack

PS I also use this when I punch out my wads for my .45-70, but I have to fit the bottle a bit for that die...