Bottom chamfers are at a 30 degree angle and the holes have teardrop cuts. Should require 0 supports to get a great print. My clip was strong enough to bend it back completely instead of snapping off.
The author remixed this model.
Tried to print the original twice but because of the print orientation of the clip they were snapping pretty easily. It was a gift so I wanted it to last a while for them. I adjusted the original model (big props to wolfCatWorkshop for including the step file) to be printed on its side so the clip prints in its strongest orientation. Added a 30 degree chamfer at the bottom which makes it asymmetric to the rounded edge at the top but the chamfer at the bottom prints perfectly compared to the fillet that was curling on me and kind of looking chewed.