Roll film backs for a Horseman 970 view/rangefinder camera?

[joannajetson]

Searching the web, I've found differing opinions about whether Graflex roll film backs will work on a Horseman 970 2-1/4 x 3-1/4 camera (a view camera that's also a rangefinder, which is the way I'd use it). It has a Graflok back, but some postings say that even though the Graflex backs will fit, the film plane won't match up, and I'd have to use a Horseman back (which are about 2x as expensive). Has anyone used one of these with a Graflex back? Thanks!

Joanna