D. L. Bullock wrote:

> The solution to most frayed rolls in a Duo-Art is simply remove and
> toss out that little box sitting on top of the soft/theme valve box
> and tube directly from tracker bar ears to pneumatic.  But you are
> not through yet.  The supply to the tracker pneumatic _must_ first
> turn off at the reroll.  You must move its supply source to something
> that is turned off when in reroll.  There are many places to tap this.
> I don't remember what I usually do as I haven't done one for a while
> but any part of the stack is off on reroll so if need be tap into the
> stack itself.

My piano has the tracking pneumatics tubed from the stack itself.
When the stack is exhausted for rewind, this cuts out the vacuum to
the tracking pneumatics.  It still doesn't work right.  Some rolls
play fine, others are a mess at certain spots because the tracking
pneumatics can't keep up with the side to side slop created during
previous plays and reroll.  It is very frustrating to hear the piano
playing just fine and then playing in a sorry combination of two keys
at once!

Now what?

Tom DeLay
Salinas, Calif.