Drilled mounting holes for the Engine Mount in the fuselage. I made a template for the mounting holes in a piece of construction paper and transferred the hole locations as closely as possible to the 1/4 inch pre drilled holes in the stainless steel firewall Drilled 3/16 inch pilot holes and verified the hole locations by installing aluminum bushings in the engine mount holes, then installing AN3 bolts through the bushings into the firewall. Removed the bushing and bolt and by 1/16 inch steps drilled up to 3/8 inch using the engine mount as a guide. Once to full size I deburred the hole, installed the mounting bolt and repeated the process for each of the remaining holes.
