These motor mounts were designed to be a cost savings over their aluminum counterparts. Additionally, provisions have been added for side mount applications. These mounts work with Tetrix MAX style motors, or any other motors with 37mm diameter housings. It's slotted under the cap mounting holes to accommodate a 6-32 nut on each side.
25-50% infill has worked pretty well for us, depending on motor application. Prints best with motor cutout oriented flat against bed.
Motor mount on 4224's 'Rover Ruckus' bot.
Finished mount with hardware, and ready to install.