Read on the Vansairforce in Plan Gotchas about missing holes on the R-405PD rudder Horn. Used R-00902-1 spar to match drill 1/8" 2 holes in the R-606PP doubler, then attched R-00917 doubler and the horn and match drilled them. Then final drilled everythig with #30 reamer. Debured both holes.
