As Joerg Wendel suggested for your pneumatic cloth needs, don't forget to
check out Pipe Organ supply houses too, since they use the heavier gage stuff
by the roll. Their stuff is too thick for striker bellows, but as far as it's
use as motor cloth and heavier, they will be of help. Find out who tunes your
local church's organ and give them a call.

I think it would be very important to check the cloth's quality using Darrell
Clarke's "starry night" test et.al. for the reason that cloth porosity is not
such as issue in the organ industry. The instruments use massive turbine
blowers, have huge reservoirs, and work on pressure rather than vacuum. A
mild leak that's unnoticeable in an organ would turn a good pneumatic player
into a kind of a musical Stairmaster exercise/fitness center. A-one, and
a-two, and-pump, and-four ...

- Karl Ellison  -  Ashland, Massachusetts
  KBEllison@aol.com  -  http://members.aol.com/kbellison/kbe.html