The two center doubler plates have to have a hole cut into them to match a hole in the spars that allows the aileron pushrods to come thru the spars to control the ailerons. After all the parts were deburred, they were then prepped for primer.
End doubler plate clamped into position and ready for match drilling
Middle Doubler plate has to have a hole cut that matches a hole in the spar for the aileron pushrods
