90's robotix motor coupling (without the external gear)

First round attempt at replacing the motor coupler on a Robotix drive motor.

This is a Work in progress

I'm not attempting to duplicate the external gear since its pretty much not needed if the motor is not driving the gripper. (for my set anyway)

I've not scanned the old one, just used calipers to get as close as possible to matching the Octagon connectors. Since the gear output shaft is 3mm i'm not going heavy detail on the inner shaft hole. It will have to be drilled out anyway.