RE: 2 stroke vs 4 stroke
I am not a Saito owner, but I do prefer four strokes over two strokes.
Four strokes have a quicker and a much more linear throttle response which makes flying some planes easier.
The sound is more pleasing to my ear.
10k is a lot of RPM for a four stroke so prop noise is reduced.
At one time I never thought that I would ever even consider four stroke engines, then I got one and now that is all I fly.