Some of the guys in our RC club have them. They're very user friendly, supposedly broken-in at the factory, and the carb is pretty much pre-set at the factory. In fact, there is almost no adjustment of the low end needle because it can only be moved a little bit. The problem seems to be that after a certain amount of running they get out of adjustment, so the pilots do whatever they do to bypass the stops,and then things get screwed up. The OS's, ST's, Fox's, Mecoa's, Thunder Tiger's, etc. seem to keep coming back to the field, but the Evo's start staying home. At least that's what I've noticed. As far as converting to CL, I haven't a clue, but I wouldn't go to the trouble. Just my personal opinion............Glen