NEMA 17 to NEMA w/ Planetary Gearhead - Thicker

I needed flanges for a few NEMA 17 Planetary Geared motors that didn't have the mounting plates for 'standard' NEMA 17 layout.

I found Glacians22's part, but there were 2 issues with it, and one modification I wanted to add:
1) It was not thick enough to completly countersink the screws used to mount the adapter to the motor.
2) The hole for the stepper was too tight - I opened it up a little bit to account for the size of the plastic. (And still had to file it some)
3) For the mod, I wa