So 130,
Have you made a final decision on what you are going to use?

I also have questions on my bipe. I fly with a Saito 150. and am a bit overpowered. I was thinking that a 3 bladed prop, being less effecient, would tone back the power a bit, If I use the same size prop(16x8) three blade.

If muti-blade props are actually less effecient is there a reason to use them other than they look cool, and or scale for some projects?