Sounds like a classic “it works until it doesn’t” case. Let’s pull up the STL, check the wall thickness, and see where the printer’s resolution bites. If the gear’s teeth are under a millimeter thick, the slicer’s slicing is going to turn them into brittle crumbs. I’ll map the stress points, we’ll tweak the geometry to give the printer a chance to finish it without turning a perfect gear into a pile of broken bits. Ready to dive in?