100 percent guaranteed. I can set up new Yamaha sled and give people starting setup and work from there. 81 Srx I have was told purple spring n1 weights. Simply put was a start. My 140 pound son and 120 pound son driving the vintage sleds. My 300 pounds dot work. I send them down track with go pro on tack and a timer. I know you can't clutch a sled from a keyboard but I know it can be a close starting point