Thanks, I will try the 14x4w and see how it works out. I was just afraid of over reving the engine. It already turns 9900 on the ground with the 15x4w, the 14x4w would go up to around 10,500. I will have to keep that in mind while flying and not run the throttle high.

I was also under the impression that the larger diameter and less pitch would equal more vertical thrust and less diameter and greater pitch gives more speed, is this also true?

Thanks again.