This is a picture from when I was replacing the drive motor, not sure if it helps - I'll try to get a better one later. It's an old industrial set if that makes a difference.
Yes, I stick with .8 unless there's something mega-fiddly to do. Are you suggesting a roller exchange?
all I have to do is to replace the rectifier diodes and find a new Euro torch fitting
(it has a fitting that’s not compatible with modern ones)