Enlargening Center Hinge Bearing Sub Assembly Nounting Holes

Another shot of the center hinge assembly - this time attempting to enlarge the holes from 1/8inch to 10/32 per the plans. These are the mountinh holes that will be secured to the rear spar with bolts instead of rivets. This was a pain in the ass - I had to use about 5 different drill bit sizes since this hole goes through 3 different layers of material - one steel, one thick aluminum, and one thin aluminum sheet. Note the huge burr that I will need to remove on the lower left hole. I will do this with a file or dremel tool to clean up all the holes. Also note the different colored clecoes. The darker copper ones are for 1/8 inch holes,and the gold ones are for 3/16th inch holes. These worked fine for holding the hinge assembly in place as I enlarged each hole. The drill its kept binding in the metal, so I finally had to put 3 in one light oil on the bits to alow them to keep cutting the metal. What a major pain this was.