Dave's comments are very similar to what I have seen flying the Contra unit in my Onas. It flew well with the single prop set-up, but it's better with the Contra. To decide it it is necessary to win at a top level, well, that's hard to say. I think most would say electric flies better then glow, but electric has yet to win the World's. But I do feel that as more top fliers try it, you will see more Contra's in competition.