What are you driving? If possible, get a starter box. Rotostart is very problematic. A good bump start is the most reliable way to start your ride. The Rotostart is repairable, but it won't be long until it stops your race day again. It will revisit you no matter what you do. Some other racers may have had better use of the Rotostart, but personally it was a nightmare for me and I've seen many other racers struggle with them.Like I said, this was just my experience. Other racers may have some input.