HI John,  I've run so many tests to prove the effectiveness of the
hand-held tracker bar pump that frankly, I'm tried of repeating myself.

There is no commercial vacuum cleaner that can even come close to doing
the job of cleaning out the tracker bar like a properly used tracker
bar pump.  The tracker bar pump really sucks great.  It produces some-
where in the neighborhood of 160-200 inches of water vacuum as compared
to perhaps 60-80 for the household vacuum cleaner.

In the final analysis, your Hoover will never damage the pouches,
(unless they are old and worn out), nor will it get the 'deep-down'
dirt (debris) that often clogs the bleed cups and reduces the
repetition rate of the notes.

John A. Tuttle