48 Tooth Abec 11 Flywheel 97mm Wheel pulley

Heres a pulley that is a slide in, not bold on attachment to an abec 11 Flywheel. The only hardware it needs are 6 20mm M3 screws for added strength, but might not need them if you use a plastic stronger then PLA. Ive had good success using PLA and 60% infill and screws. The 9mm belt won't need any supports, but the 12 an 15mm ones probably need supports.
NEW: 21mm pulley files added 11/26/17