Light Leaks

Has anyone just given up on chasing light leaks, and resorted to gaffers tape for every roll shot? I can't seem to get this Pentax 67 to stop leaking light without it. I've replaced the lights seals multiple times. It works great with the gaffers tape, so the leaks must be around the film door, it's just a chore standing there with someone as I tape up the back of my camera.