fortified main drive gear for most garage door openers

the motor broke mudfoot's original design that I printed with 88% infill while I was trying to calibrate the garage door- so I fortified the model a bit such that it's much stronger and doesn't require supports.

It successfully has opened/closed the garage door 40+ times since I installed it today despite me jamming the motor while calibrating it (again :)

I printed with 3 shells 100% infill using PLA!