Finished the write up for the custom gear I made for a serger. Fun little project. You can find it in the project section. I still need to add the gear to thingiverse.com but the Lifter Arm is there.
-bornity
My mother's 30.y.o. Hobbylock 794 Serger had been rendered unusable by a cracked lifer gear. A nearby Sewing Machine Repair shop was unable to repair it because they could not source the part. Google-fu did not turn up any results so it was the perfect part to reverse engineer and 3D print.
You can get the Lifter Arm (Presser Bar Lifter) here: http://www.thingiverse.com/thing:2281178