I just realigned my old RF Saturday, which was misaligned in both dimensions, with much back and forth screw setting. The horizontal adjustment screw is very hard to twist, and on my camera the brass ring for vertical adjustment is very stiff too. Finally, after an hour of fiddling I got the images perfectly adjusted.
I was using Tony Kwan's old DIY directions, and did not know about the third adjustment for the roller, but I did not need to adjust that seemingly. There is a lot of great information in that thread. Thanks, awilder and Issy.
I'm glad to resurrect the body. It sure is handy to have a high speed shutter sometimes.