ps with the little 30 they swing light small light props so not much inertia in the crank,unless you are some sort of tuning guru getting a good consistent idle can be difficult.The heavy mas classics help (not the series 2) a bit but so does 2% acetone.I prefer up to 10% petrol in the mix but normally 5 to 7% is enough to keep the plug lit at low speeds.It's the only way we could keep three of the lower cylinders on a 770 seidal radial lit at idle and the engine ran sweet as.