CD,

I have the Saito 100 in mine, so that's what I would reccomend. I'm turning a 13X10 APC prop which makes this baby go palces some kinda fast! Currently holds the prop plane speed record at our airfield at 128 MPH. Other than it's an awesome engine, that's pretty much all I can tell you. As far as the Shoestring, get ready because you're gonna get hooked. It' has to be one of the best flying planes I own. It is indeed a racer, but it flies like it's on a rail, a lot like a pattern plane. You get speed and precision out of one airplane, what more can a speed freak ask for?

John