Discovering the 19cm Makina Lens by Nokton48, on Flickr
Actually I have two of these, one focuses closer than the other. Both look excellent on the ground glass. I've finished a roll of Eastman 5222 XX 120, in a 6.5x9cm Makina Film Back. To focus you set the camera focus to infinity, then rangefinder focus and note the distance. Then set the body back to infinity, and then rotate the helical on the lens to whatever distance you noted. I've been doing this and it's very accurate and precise, I'm planning to shoot more tests. So far I have shot with the lens on the right, with #1 Yellow Makina FIlter and Makina Lens Hood. Easy and user friendly process, I think i like using this, lots of uses for telephoto photography. The viewfinder glass it gridded out to use the 19cm and very price as a way to frame. I'm having fun discovering this lens. Next I'm trying Kentmere 400 and Foma 200 pushed as far as possible. New addition is Foma Retropan 320 Soft developed in the Retropan developer.
If I've understood right you and you are saying once rangfinder distance is found, camera is set back to infinity and distance set on lens? This is contrary to the Makina manual which says focus distance should be found on rangfinder, left as is but transferred to the lens. This is what I've been doing and focus is spot on. But curious that you get accurate focus your way too.