Adjusting for Dogmar

Today I adjusted the infinity stops for 6.5 inch Dogmar. Not entirely sure if I'm doing it right though. I opened the iris all the way open and set the focusing aid on the bed to infinity and locked the bed. Then I moved the lens board forward on the rails until buildings around 2 miles away were sharp. I still can't trust the focusing aid on the bed for shorter distances. Maybe the focusing aid is calibrated for the original 127mm lens. Well, maybe I will take my time only shoot with hood.