My Comp Arf was balanced on the front edge of the wing tube as recommended in the manual. Pretty easy to do as the kit came with a balance jig. I've moved stuff around over the last 4 seasons and have no idea where the measured balance point is now but plane still flies great so I guess all is well. The manual does say you can move balance point 10-15 mm forward of wing tube if you like a more nose heavy feel.