According to Canada Post my Leonardos have arrived in town as of 8:00AM. It possible, though not probable, that was early enough for the mail carrier to have gotten the package before heading out so I may receive them today. Tomorrow for sure.
This time I'm leaving my actual rotator in the Dome (don't want to break more USB ports) and the leos will just have buttons etc added to them to simulate end switches etc.
With any luck the current iteration will be complete in the next two weeks. After that I'll look at an ASCOM local server setup so the RG11 can be used as a separate safety device with it's own driver. That'll also allow other goodies to be hung off the rotator (or shutter) with their own drivers too.