I have experimented using 5% fuel in several Saitos, they run super smooth on it, the LS needle needs leaned a little but thats about it. My conclusion is that the "Saitos need nitro" fad, is bunk. They may respond favorably to it up to a degree but certainly don't need it. The only Saito that doesn't run well on the 5% is the little .30, it requires idling a little faster on the 5%.