planetary gearbox 16:1 without screws

you need to print in total: 2 carrier bottoms, 6 carrier gears, 6 carrier spacers, 6 carrier studs, 2 carrier top, 1 body bottom, 1 body ring gear, 1 body top and a sun gear.

print settings:

carrier bottom 100% infill                                                                                                                                               carrier gears    100% infill

You can print the rest with whichever settings you like!