Those and starter boxes. Both do have the uses and i've used both but really. the pull start is so much easier since you have less to carry around. I always take a 4 way glow rench, small flat head screw driver, fuel (in fuel bottle) transmitter and the ignitor when im gonna go run. so if i have to carry the spin/roto start system with me it starts to add up.... unless you build yourself a trailer

Both the spin/pull start combo is a great idea. just have to work out the fitting issue. Maybe it was just that one?!?![&:]