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<DIV><FONT size=2>We had those big simple pistons, like cartoon bug sprayers,
that worked great. About 2' long, 4" diameter, with a nozzle on the
end. You can get a lot of air through them, and control it.
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<DIV><FONT size=2>I was just in Comp USA looking at various compressed air
devices, and wondering the same thing. Freezing wood or strings would be
bad. Another small device used CO2 cartridges. Some of them contain
oil, for use in BB guns (to lubricate). How many soundboards (and
especially actions) could you clean with one $8 can of compressed
air?</FONT></DIV>
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<DIV><FONT size=2>--Cy--</FONT></DIV>
<DIV><FONT size=2>SHUSTERpiano.com</FONT></DIV>
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