Jon I have found a few places where you can get brass sheets for making reeds if you are interested and I might be interested in having you make a set of stamps for me in the future if you are willing and depending on cost (shipping in from the States can get expensive at time though. Nice looking work by the way (better than my first set to be honest, scraped them). Best of luck with the tuning as one of the item I do with harmonica reeds you can't really do with concertina reeds (heat bath to reduce stress in the reed, though it can be touch and go on that front as well, to hot and they are too soft and worthless, too cool and you have done nothing but spent electricity).
Good luck and best wishes to you.
I would be interested in the sheet brass., or maybe use spring steel? I should be able to cut out the frames from bar stock on my CNC Micro Mill, just have to draw them up, Might be a fun project. The other option would be to cast them from a silicon mold, using the lost wax process? The problem would be getting the correct size as there is shrinkage.
I will see how this stamp comes out, shouldn't be a problem to make more. Shipping isn't to bad over seas, and I can wrap it up as a Christmas gift!
I just finished tuning all the reeds, went without a hitch. I will only have to have one replaced, that was already broken, and two that are replacement steel reeds. You get the hang of it after a few times putting it together and taking it apart!
Getting them spot on is the hard part, especially with the big ones. I used a tuning program that I use when I tune my simple system flutes, but when you are dealing with a fraction of a cent, gets a little dicey! My 20 key Lachenal will be a piece of cake after doing 96 reeds, that have to be tuned alike! I was up in the high desert for a week, so it was a good project for that quite spot.
I found the brass quite resilient, maybe since the box has been in the tropics for all these years? I was able to realign one of the tongues, that had been fiddled with by some well meaning repairer in the past...
My other project is making new fret boards for the mini Lachenal 20 key that I have. I have drawn them in Autocad and generated the Gcode to cut them, when I return. I will start a new thread on that project...
PS also got all those bellow papers glued on, another fun project.