dont get me wrong, i love to play with engines. i do understand gas ones, b/c i was into hot rods b4 airplanes, so what i learned doing that, will transfer over to these conversion engines. as per the glow engine i was having trouble with, even the most experienced guys (they've been flying for 25-30 years) couldnt get this engine to run right. then i bought a webra 40, and i had no trouble tuning it by myself. another main reason i want a gasser, is the ablility for it to hold a setting. my glow engine always seems to be a little bit "off" b/c the high speed needle has a tendency to get bumped or snagged on the cargo net in the trunk of my car. the carb on the gasser i want, will be well out of the way of any obstructions, plus the 1/4 scale cub has a cowl, which will help any mishaps from happening. The guys at my field had similar problems with their planes. there are only a few of us that have nice big trucks or suvs. (thats the next thing on my list)