While your in stirling mode
Would you be enterested in putting together the parts for small kits to be built?
Once I get some other things done I'll be getting into casting aluminum. For now I been casting various things with lead free pewter. I also do some plating, chrome, silver, gold, brass, nickle...
Engine kits are on my to do "someday" list. Mini steam, compressed air, stirling.
I bet a solidly built working stirling engine kit, polished and plated,ready to assemble would sell well and bring alot more interest to the stirling engines also. I know if I could find one priced reasonably I would probably buy it myself. Best I have found is a built working stirling for around $100 or so. Like those hand helds. Didn't buy one.
If I had a prototype to mold from I could probably make casting molds for most the parts like flywheel, rods, stands, cylinder ect.. anything that can be solid and a little heavy. Aluminum is hard to plate because oxidation occures so fast. Pewter is easier but a bit more expensive around $8lb (I think) last I bought it.
If you think you'd be interested I'll email you and we can talk about it.