Thanks for that info, it is very informative. The hinges are CA type. This sounds like maybe more than I should try to tackle. All the hinges are secure at the moment and work (I have tugged on them and did find one lose but re CA it) So if I decide not to replace the hinges how do you cover the aileron without removing it? Would I do each half and just cut to fit around the hinge? When cutting the old hinges off and making new slots will this ruin the intergerty of the wing at all?