I like the low end idle and the fast response i get when I rev it up. I also can put the fuel tank where I want it. On mine I have it on CG . I have lots of engine runs on it and I have never had to re- adjust the engine at all. I am so pleased with the way it runs I made a trade for a new Saito 100 and it will go on my next 3-d plane I am looking real hard at the Hype or yak OMP profile when I finish my World Fun Air 3-D 140. I picked A extra cline up on RCU for $30 new. And they go on E-Bay for about the same price just have to keep your eye open for the killer deals. SL (PRO BRO #429)