Fit the rear spar reinforcement plates to the RH main spar and match drilled. Cut aileron push rod clearance holes in rear spar center reinforcement plates (LH and RH). Deburred drill holes. Scuffed surfaces and solvent cleaned reinforcement plates for LH and RH rear spars.
Using step drill to open 3/4" hole in aileron push rod cutout
Using dremel sanding wheel to open push rod clearance hole to final size