Can you share the source of these? FWIW, I already figured out it was the RD-370, but not the exact model. I'd like to pick up the motor and the worm, I'll have to figure something to do the adapter plate, I don't have the fancy metal working that you obviously do.
I looked at that exact model, it seems a bit slow unless you're running it at a pretty high voltage. Have you actually run this engine with the motor mounted?