Drilled the angle gussets to the main plate. Drilled the doubler plate as well. Dimpled the forwards and aft angle gussets for flush rivets because I have a lot of these that aren't going to be used elsewhere. Riveted the center gusset and doubler plate. Installed the bracket provided with the ELT. Seems pretty stable. Formed up support brackets for each end of the 1x1x.125 angle which forms up the inner edge of this support shelf. This will give some wheelbase to the 1x1x.125 where it attaches to the fuselage structure at the forwards and aft ends.