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Player Piano Tracking Problem
By Bruce Clark 

Do not use 3-in-1 Oil, or WD-40 on anything. It works for awhile, then
can cause trouble as it ages.

Sewing machine oil is a much better choice.  It will not turn gummy.

(Message sent Sat, 13 Jul 2019 04:02:03 -0700 (PDT) , from time zone -0700.)

Key Words in Subject:  Piano, Player, Problem, Tracking