Hi List,  To install rubber tubing, on a tracker bar, I use rubbing
alcohol.  I just dip the tube in the alcohol, to the depth I want the
tube to go.  It then slips on easily, just that amount.  This idea came
from Patrick Parent, who was giving a class on player pianos, at a PTG
seminar.

Regards,
John M. Ross
Windsor, Nova Scotia, Canada