hope this helps jkelly-you might want to get a tech to look @your lesli,by adjusting belt tightness can vary leslie speed slightly,BUTTTTTTT!!! do not try this with the leslie running-can break some fongers or other body parts can get serious injury! hire a brother who works,workers are worthy of their hire>or hire a heathen,but witness CHRIST to them,isn't that part of church/music MINISTRY?