: Malcolm,
: If I recall correctly Ross leidy made a poor mans vacum system for
: a paddle, you may want to look at his site to get some
: inspiration.
: Scott

Used an old refrigerator compressor, good use for one, though it's illegal to dump the refrigerant anymore and a lousy idea to do it anyway if you care about the ozone layer. A refrigeration tech might be happy to get free refrigerant, it's getting expensive these days.

Bill H.