For power to weight, you want a two stroke. For raw power, you want a two stroke. For ease of adjustment, you want a two stroke. If coaxing an engine to life and the purrrrrr of the valves does it for you, get the four stroke. (they are more fuel efficient too) The Saito 4 strokes use a lot of oil in their mix, and it will end up coming out the exhaust. My FG20 is 20:1 vs some common two stroke are running 80 or 90:1. The FG36 has a Walbro carb and if you know those carbs (very common) they tune well. The FG 20 (and soon to be avail 18) use a new Saito carb that has a very touchy needle. The Saito engine is a pretty good price. Take a look at some of the $4KUS plus petrol four strokes out of Europe. http://www.troybuiltmodels.com/categ...s-Engines.html Makes the Saito price tag look like a Kmart blue-light special.

Regardless, I love my FG20, but it's not for everyone. Part of the hobby for me is running an engine, not just flying. If all you want to do is fly, you probably should look at a popular brand of two stoke.