I purchased an RXP and RXT from my boss. Now, the RXT is supercharged and does roughly 65ish. The RXP does about 10-12 MPH less than that. How can I get my RXP to run faster? Can a supercharger be added? I am asking newbie questions of a mechanical nature but have been running skis for a long time. I just don't take them apart. Any help would be appreciated. I am located near Raleigh NC if it helps with places that do such things.