3. Forgot to make larger holes in the ribs for the servo cable to go through. Gonna have to find a good way to enlarge them now.
I had that problem too. Originally built the wing with the single central servo, then my wife bought me a Futaba 9CAF for Christmas (did I marry the right girl or what?) Had to remove the wing sheeting, repair the cut center rib, cut servo wire holes in the ribs with a hobby knife, then re-sheet and glass everything.
Was worth it in the long run though
