Hi Odd Duck,
I can only imagine.My sister has two teenage boys and they keep her plenty busy. Wow,you're making a belt drive unit? It sounds like you're going to have a few models available. I think that what you're doing is wonderful and very ambitious. Now that I've been bit by the forging bug, your work and creativity serve to inspire me even more. I look forward to seeing your pics. Have a great week.
Ken