Hi Buzz,
The plans for machine #2 seem to be well under way.
Your web site posted earlier (message #4) is an excellent record of the building of the first machine. Thanks for sharing.
Shipping & border brokerage for the Lovejoy couplings was certainly expensive!
Princess Auto (in your hometown I see) has a "flex coupling" that I have successfuly used to join servos to speed reducers. They might be worth checking, to save the extra costs.
See Page 93 of their
catalogue.