I have a set of Guide 903-J headlights and the OTB trim rings are a terrible fit. The tighting parts were so extra bulky that the ring was 1/4" from fitting at the bottom. I spent a lot of time taking the rings apart and changing the shapes of the parts to try to make them fit. They still do not fit. The only solution is to cut the buckets for clearance. The buckets are exactly as produced with no damage and the original rings of course fit perfect.