RE: .30 or smaller 4 stroke engine?
Unfortunately many people will justify the ARF's on the basis of them being cheaper than a kit plus the goodies needed to finish them.
They put no value whatsoever on the hours of enjoyable work actually building something. I suppose their pride is different, they take pride in just owning something rather than taking pride in creating something. I have a couple of ARF's but they leave me feeling a little empty, unlike something I build which gives me a sense of achievement every time I fly one. - John.