I feel your pain!! I have a Janome Horizon, and bought the accufeed 1/4" foot. I sew about 10 feet for a 4 patch sashing only to realize that it sewed 3/8" seams. My fault. I should have tested it first. The needle needs to be moved over, way over to give 1/4" seams. Guess what I did for 5 hours yesterday. :-((