[Izzy]

Very nice planning - easily understood that you have a pasion for this model - great to see - and great to learn from - thanks so much for sharring your journey! I am interested to see how the vane motor / pump turns out for you.
Q - do vane motors have a tendancy to cavatate on start up due to lackof pressure on the indiviual vanes?

I've like vane motors since they do self adjust for wear - at least on the vanes that is....

another place for planetaries are air tools - drills specifically - they use vane motors as well which inherintly need high RPM due to being pneumatic.
- check out a low RPM but large chuck hand drill.

Izzy