Below are the inboard ribs of the fuel tanks showing the backing plates and the holes I cut in the ribs with the hole cutter. Oh, the carnage...it was a noisy, messy job with the hole cutter (aka fly cutter) in the drill press. But, the holes did come out nice and neat and round. In the above right of the picture are the covers that close up the holes and hold the fuel level senders and fuel supply lines. Should be a quick job to finish up these and then it's on to the fuel caps and fuel drains.