Hi, I just use a regular wet/dry shop vac and a variac (variable transformer) to slow down the motor. Or if you don't have a variac, you can uses a thyristor motor speed controller or lamp dimmer of sufficient wattage. Thyristor lamp dimmers are available in electrical stores, but the common ones are limited to 600 watts, which is OK for a 2/3 horsepower motor or less. Vacumn Cleaners use brush type motors which are OK to use with thyristor speed/dimmer controllers. For a 2 HP moter you need a 1500 or so watt dimmer. Paul "BRONX ANODD" (tm) in organic forms with full American violence emitting, is three-dimensional curves demonstrate mystic movements as if they were of unknown life. The body with well trained muscles but no extra flesh dashes is the dark with sharpened knife-like brilliance emitting. Now, nobody can stand in his way "BRONX ANODD" has just released hot. -- English language ad copy for alloy wheels from "Option, Communication Car Magazine", March 1998 issue, Japan.