I started today by drilling the remainder of the holes for the fuel tank attach platenuts to #40. I then countersunk the holes to allow an AN426AD3-4 rivet to fit flush. I clecoed on all the platenuts and then riveted them in place. I then used a scrap piece of aluminum angle to set my #30 countersink to the proper depth to countersink the holes for the #8 screws.