RE: Sirio .30 w/ roto-start system?
It always takes two to argue...ignore him and it will be short lived. The Sirio uses the HPI Rotostart system and it will not start via Losi Rotostart. I have the Sirio and it works great...just make sure that the exhaust gasket is tight because excessive oil will drip down into the Rotostart and cause the one-way bearing to slip. The Losi style is inside engine and tends to slip less...from my experience. I also race with the Sportwerks .26 which is almost exactly like the Mach. It has the bearing inside the crankcase and tends to slip less.