Nice! I'm waiting on my Bessa R to arrive. I figured I'd try it with an unloved I-61 first, as well. I expect, though, that the Bessa will probably become the platform for my Summicron 50 and occasionaly the 90 Elmar since it has the framelines, and the 25 Skopar and 50 Elmar will be left on the IIIc.