Bronica 35mm Back

[Brian]

Has anyone used KR64 with the Bronica ETRS 35mm back. The threading in the back is a reverse fold of a 35mm camera and wondering if anyine has experienced any and problems such as stress lines. I've used the back a few time with Tech Pan, Scalia and XP2 with no problems but never Kodachrome. I just picked up 3 rolls and while I could throw it into my Leica, I prefer the Bronica as I can mix both film size and emulsions just by swapping backs.