@introspect_2630503 I'm glad you were able to fix it by scaling it down! Unfortunately the key is a weak point in my design.
If you DO need to print it again, any of these alternate keys are a lot stronger: https://www.printables.com/model/376543-alternate-print-in-place-puzzle-keys
Update: got the screw out by screwing a real screw into it and pulling it out. Printed new one with carbon fiber pla. Printed it at 98% so it wouldn't stick this time. all is working now. Thanks for the nice puzzle.
Any way to fix a broken key? Went in about 75% ok and then seized. Tried to turn and it busted. The rest moves and rattles and the print is excellent - just want to know if I can save the bottom? (edited)