I have found this discussion very interesting and kind of thought that the little prong on my 180K could be hooked up to the positive to make the big...
I also think ACF-50 is better than zinc chromate because it weeps between skin laps and would also help if there is steel against aluminum. Just make...
I think most if not all of the exterior skin reinforcements are flat and nothing special such as the late model style piece ahead of the landing gear...