The only way an O roll can be tracked is with the flanges clamped
tightly on each side of the roll chuck at the top. If the spool frame
is not square, then nothing you can do will ever track the roll.
But if the spool frame is square, then it has no choice but to track
perfectly. Where else can it go? What else can it do?
Bump the roll a number of times on it's left "drive" flange until all
the paper is flush. Then clamp the right drive flange as tight as you
can get it against the paper roll and *tighten* the flange screw,
then twist the flange a bit back and forth to see if it wants to loosen
back up, and retighten.
[ Read about Craig's awesome O roll playing orchestrion, "Spirit
[ of Independence", at http://mmd.foxtail.com/Pictures/ -- Robbie