I've been using the 4-40 bolt method and it has worked fine for me. And it is simple. I read where a fellow was worried about the security so he modified it with a 1/4 20 bolt and nut thru the root rib into the fuselage. well in flight the nut vibrated loose and the wing moved out enough to disengage the antirotation pins and the wing rotated and the plane was lost, so be careful if you do decide to try a different method. Also mine flys fine with one 8411 servo per aileron. The bad rep this fine airplane got earlier on is great because now those of us who know better can buy them cheaply. Enjoy!