I'm interested in purchasing a 20cc gas engine.Ive boiled it down to 3. OS,DLE or Evolution. which one is the most reliable? I'm not concerned about the cost, just reliability.service ,longevity and ease of starting etc,etc,etc..you know what I mean? What do you guys recommend and the ones you have experiences with. I own a G26 and a G38,, I want to get one of the smaller ones. Not sure yet what plane I'm going to put it yet. Whats the difference between the DLE RA and the DLE air?

Thanks a million-----TAZZZZ