Hole-ly Nema 17

thingiverse

This model features Spacexula's Nema 17 variation, which has negative holes for pin placement that go all the way through. The 4mm version is compatible with 3mm filament without any issues, while the 3mm version likely fits mounting screws appropriately. A photo displays a 4mm model using 3mm filament for modeling purposes and no screws. The center area could be smaller; however, a removable insert will be added for motor use to ensure proper gear rotation. Concentric filling is beneficial as it follows the shape and addresses outer shell issues, even if your renticular can't close gaps at the edges.