Hung, marked, and drilled inboard skin to the wing structure. Also drilled the wingwalk doubler. I called Vans to verify the positioning of the leading edge of the wingwalk. I was told the the leading edge butts up against the training edge of the spar flange, so that is how I installed it. I'm not sure if the training edge of the wingwalk doubler needs to be so long. I will research and consider trimming it down to the rear spar to reduce the chance of the flap catching.
