RE: Aeroworks Extra 260 75cc question
pilot511, go directly to a 27X10 - no need for the 26X10. The best prop for that engine is the Mejzlik 27X10TH(TH stands for thin).
Also, be prepared to deviate from the instructions as far as where equipment goes - you need to put your rudder servo in the tail, and the batteries at the back of the rudder tray in the fuse to get the plane to balance.
Consider a CF wing tube, as the stock tube is very heavy - it is plugged with a wood dowel in the center of the tube. You will save 6-7 ounces in a flash. Keeping this plane under 23 pounds is a goal to aspire to. In fact, mine was 21 pounds and I wouldn't have wanted it much heavier...