I just tried gas/glow in a SuperTigre 40 last night. [8D] My mix was started with 30 percent glow (Omega 10%) and 70 percent premium grade gasoline. I had just a bit of seperation and since it is a bushing motor I added Klotz until all was blended and clear. With an OS #8 plug it would run rough when the glow power was removed and die if throttled back below about 3/4. I changed to an OS F plug and it ran quite well full throttle and would idle down to about 3500 to 4000 before it would die. If the glow power is left on it will idle down quite low and very reliably. What would be the best additive to try and improve the idle characteristics. It runs very good at full throttle, only about 300 rpm's down from straight glow. CHT is up about 75 deg from straight glow but still not horrible and if richened any to try and bring the CHT down the engine becomes very rough and sounds as though it is missing. I tried both adding and removing a head shim but removing one made it detonate and adding one made it run worse when the glow was removed. Any help would be appreciated. [8D]