I have the sig something extra and it calls for duel aileron servos in the wings. It also calls for two 6 inch extentions for the servo wires. My question is....do I have to use a y-harness on top of that or is there some sort of duel connector I can hook to the 6 inch extentions and then hook that into my wire coming from my receiver? I'm using a futaba standard radio.

"confused"

The two extensions are nice but not absolutely necessary. Without them, the wires on my Futaba servos extended abut 1" past the root of the wing. You can just hook your y-harness up directly to the servo plugs if you want. The extensions do make everything a little easier to plug in, although you have more wires to tuck out of the way.