Stay away from wood props!!!! I tried the 16*5 zinger and it was terrible. Very inefficient blade design. Stick to APC or graupner for your basic props. They are very well designed and will yield the best results, and trust me I know through experience. You might want to try the W series of APC's if your not already. The 15*4w on 30% in a Saito 100 will make alot of power and let you keep the engine rich and happy. If not try a 15*6, 16*4w, or 16*6 and try using the stick on the right, you know the one with the dust on it. I fly a 15*6 on a YS 91 on a UCD60 and it is a terrific combo. Just my 2 cents.