MK3S x-motor cable strain with cooling openings

I really liked the design by argoroots, and made a few tweaks to it: I added a rounded "gutter" for the wiring harness to nestle into; I split the gutter down the middle with a self-centering groove, so that it would tighten a little more around the stepper motor; i added openings around the perimeter to give the motor a little more cooling. Print instructions Printed in PETG, 20% infill, 02mm layer heigh, no supports.