Hi, I'm Richard and am trying to get back into RC flying.

I had flown heli's some years ago, left the hobby, but now want to give planes a try. I've ordered a Sig Kadet 40 to start as a trainer, but am having difficulty determining which engine to place in it. I'm leaning toward 4-strokes, but not sure which manufacturer (Saito. OS, YS) and what size. SIG recommends a .40-.46 (2-stroke) or .40-.54 (4-stroke). But the 4-stoke recommendation seems a bit small. I attempted a search here without much success. Any advice?

Thanks!