Actually this post doesn't have anything at all to do with Aeolian
valves, but it does address the original problem of the player shift-
ing into reroll prematurely. I walked into an identical late 60's-
early 70's Aeolian player today that had the same problem-- shifting
into reroll part way through the roll, with no obvious damage to the
edge of the roll. It turned out that the nut that holds the upper brake
assembly in place had loosened up (probably from vibration) to the point
that there was no braking action at all during "play". This caused the
roll, at purely random times, to "flutter" just enough to allow a signal
to sneak through the reroll port and shift the transmission into reroll.
Tightening the nut restored the functioning of the brake and corrected
the problem.

Les Smith