Well, I've just done my own comparitive research, Saito 100 vs. evolution 100, and it seems as though I've been lied to. Guess I bought the bigger prop thing hook line and sinker, and never really checked it out. However, I still really love the sound of the four stroke, and wouldn't trade them for anything. I've never said that you would win any pylon races with one, but man you can't beat em for scale sound (unless you go to a big gasser, of course). Maybe I'll consider a large 2 st for my next project now.....But, I will always own and continue to purchase four strokes as well!