Drilled holes in SNX-W12. Made template from aft end of aft wing rib to locate holes. To cut through holes in rear spar I used a laminate trim bit from a router and put it in my drill press set to high speed. I clecoed the attach plate (and later the double plates) with their pre-cut holes and used the precut holes as the guide for the bearing on the trim bit. It worked great! Finshed hole is exact with milled finish.
