You can always check focus with a DIY ground glass. Get a piece of plexi or similar and cover one face with scotch magic tape to simulate the surface of a ground glass. The side with the tape is your film plane. Hold that side to the film rollers and compare the focus to the focusing ground glass. If they dont match, I would make sure the ground glass in the viewing hood has not been flipped before I started messing with the lens. Here are a few shots from my 22 with the cheaper 3-element Graflar lens. Not a great lens, but can be quite sharp stopped down a bit. Both were shot from a tripod with a cable release: