Well, back from my trip and back to nutplate hell! In the aux tank bay along the back edge it was just the .028 wing skin back there and I want to install a doubler. I cut a strip 1/2in wide from the skin cut from the wing for the tank bay and fit it in place. All that's left to do is drill a bazilloin holes, deburr, countersink and install nutplates. yay...