Several earlier posts have raised questions about the interchanability of rollholder backs on different camera models made by Graflex. Rollholders for reflex models with the Graflex are different from those for the later Graflok back, and are particularly difficult to find and are usually expensive.

With Bert Saunders' help, I have created some pages that describe how I converted a Graphic rollholder to work with my Graflex Series B 2x3. You can find that at:
http://www.staff.uiuc.edu/~b-wallen/BN_Photo/XLBackConv1a.htm