I made two versions, one for a BB shell and the other for s steerer. The steerer version is based on a 1 1/8" steerer and the reducing sleeve, to 1", has a cutout for the stamp to go through. With my stamp set the forming of the head bulged out the stamp's end a bit so i sometimes need to slightly grind off that to let the stamp slide through the slot. That slot was cut specifically for the stamps, your stamps might need a different slot size. Both are cut from 3/4" thick Al (old jig plate).
These stamp holders work very well. One can really smack away with no fear of a thumb strike
What i wanted was a holder that could be secured in place about the shell or steerer and held one stamp at a time. Andy (who wasted a day chasing sink fixture parts only to find out our sink is metric and the supply lines available are SAE)
