I've modified my dust collector setup to improve performance and reduce
dust.

I ripped the thing appart, hung the motor upside down from the ceiling
joists and replaced the filter bag with a box and gas turbine filter
assembly.

This was done for fairly cheap using a standard 2hp, 220 volts dust
collector (King Professional).

You can have a look at it he

http://pages.videotron.ca/guizzmo/dustcollector.html