I may have detailed this earlier in the thread, but heres a quick review. This kit called for CA hinges which I do not like, so I have been using Dubro nylon hinges instead. After I built the control surfaces I slotted them with the GP hinge slotter machine and slotting tools to get a perfect fit or as close as possible, then after covering I cut slits in the covering and took the trim iron to open the slots and melt the covering, then sand each hinge a bit and clean with denatured alcohol and use 30 min epoxy to glue into the control surfaces first, let cure for 24 hours, then into the wing or fixed surface last. I also put a few drops of machine oil on the hinge part so the epoxy wont stick to it and as you install the hinges I carefully wipe any excess epoxy with cue tips and alcohol. This method results in free moving control surfaces that should last the life of the model.