At a PHSNE show ( Boston area, a year ago), a fellow had a display table on which he was demonstrating that it was very easy to buy the proper roller stock , cut it to size and install it in the earlier backs. I got called back to my table & when I returned he was gone. Six months later, I couldn't find him at the subsequent show and still haven't found out his name, etc. Now this is an important issue since all Graflex/Graphic users appear to aqree that the rollers really add to film flatness in these otherwise satisfactory backs. Anyone know about this procedure? Thanks in advance.