This adapter plate allows you to replace the motor from a Denso window motor/gearbox with a BAG motor. These are parts from the First Robotics Competition (FRC) kit of parts. I think it would be competition legal, since the motor itself is not modified. However, it was used as a replacement for an old robot (2010).
The shaft of the motor needs to be ground down on 2 sides to fit.
bag_to_denso_gearbox_adapter.stl | 146.0KB |