This is a video that one of our mentors was making to teach our team how to use Fusion360. The tool he made in this video works very good but I do caution you if you use one to spin the motor don’t spin it at high speed because you can generate electricity and damage the motor controller.
The hex adapter version snapped off at the layer lines right away. That could possibly be rectified with print settings and or material.
Edit: the square drive in this video works great