Spur Gear 63 tooth for Traxxas Slash 2WD

This is a Traxxas Slash 2WD 1/10 model 64t (64 teeth) spur gear. I plan to use it with the 28 tooth pinion gear I just posted. It will not work with the 23 tooth pinion or lesser toothed pinion gears because it is smaller. This is not based on any existing Traxxas parts that I know of, but the parts I made (28 tooth pinion + 67 tooth spur or 64 tooth spur) fit together.

Please LIKE or comment what is wrong. Thanks!

Use at your own risk. Enjoy!
Version notes: V1 inner wall was too thin