Uses M6 Hexagon spacers to provide a fastening surface for top and bottom panels to robots. I have used these in a few featherweights, and haven't experienced a failure yet.
A 4WD robot with these mounts has been tested up to 88Kg and worked fine.
Use a few wraps of tape so secure the rear of the motor snugly in the mount, this ensures a small amount of compliance, and can fit various flux ring sizes.
The author marked this model as their own original creation.