Quote Originally Posted by Ross77 View Post
Ah. so you dont need such tight tolerances at low rpm then?...
Didn't quite say this
It's a combination of target (comparatively low) rpm and light duty, that makes me think I can get away with a simplified design.

BTW, you have also asked:
...I'm interested to see what you are going to drive it with?...
Didn't give much thought yet. Definitely nothing fancy until I am convinced that I can make it work OK.
For the moment I have (don't laugh) sewing m/c motor and that will do for the testing.