ricdel, what I mean is that there should be at least five hinges in an aileron. Evenly spaced. And what I mean by six in all, is that there are to be two hinges side by side at the tip within at least 1/2 inch from the end. This will prevent most tendencies of the hinge to break as a result of flutter. Never follow manufacture recomendations if there are less than five hinges. This goes for the other control surfaces also. Three or more in the rudder, five in the elevator if it is one piece like the eagle II or three or four on each side if they are split. Never use nylon hinges that do not have pins in them. I have seen too many planes lost because of them coming out in flight. The epoxy will not hold. They must be pinned through the wood in each surface and that is a hastle when covering. The dubro style of hinge with the pin should be reserved for the bigger birds and then I will opt to put in CA hinges. If you do it right, you will never loose a bird because of CA hinges. As I said, Sonic Tronics slotted hinges are my choice. Hope this cleared it up. If not, please continue to ask questions till it is. Many thanx. bird.