Roller hangers do make a difference, which one did you end up with? I recently picked up a pair of old Zues 2000 hangers for my travel bike in hopes of enjoying the benefits of rollers without adding to the challenges of disassembly (they are open on the back side).
What Mafacs were on the bike originally? I'm building up a '76 Eisentraut that came with Campy NR sidepulls and have convinced myself to avoid even trying them. I have a pair of both Mafac Racers and Raids in hopes of running the bike either 700c or 650b with a simple wheel and brake change.