Well I have started to model parts for the Curta! It's kind of cool using drawings you can tell were drawn by hand....not something you ever see now. I think I will be able to just machine this guy out of aluminum on the cnc with some creative way to hold/locate it from setup to setup.
I also started buying a few pieces of aluminum and brass to test out fits and play with silver soldering. I think that might be how I attach the tiny gears to all the sleeves....