Well Paul ron,

I would have to say you have been lucky, I am a parts manufacture as well as a repair person and have seen many backs have problems unless they were used with the film designed for them, if you look carefully at the 220 and the 120 backs, you will find the spring tension on the backs are different, in fact the part numbers are different for the respective springs, in my opinion an it is just that, it is not worth the risk to damage a back, of course I could tell him no problem and then I would be in the running to do a repair if damage occured.

Just my .02 cents.

Dave Parker
Satin Snow(TM) Ground Glass