In my experience, a plastic 12x4 prop is a little on the big side for a 46. A wooden Zinger 12x4 is lighter and will let the engine rev higer. I use APC 12x4 and Magnum 52 on similar planes. I like the Magnum because it is a lot cheaper (I crash a lot), and more powerful than 46. I have enough engine experience to tune it correctly. I thought I was the only guy still using 2 strokes. If I ever quit crashing, or win the lottery, I might buy a 4 stroke, but I doubt it.