I regret having purchased the ST3250 in the first place now that I've tried gasoline-powered engines. I think that when you get into the 1/4 scale or bigger planes, it usually just makes sense to buy a gas engine. You spend more in the beginning, but the fuel is cheap and burns more slowly. Either that or buy a Moki, if you must have a glow engine.

I've had four gasoline engines now and all have been powerful and reliable, (except the 40cc, which has suffered some odd mishaps, but I digress...).