11-09-2011:
Today I was a little nervous, didn't want to mess up the position/fitting of the fuel tank to other parts because the leading edge is permanently riveted to the spar. I followed Van's instruction, started drilling the most inboard Z bracket using the spar as a guide. This is a little hard because the nutplates are already installed to the spar, the access is not great. I had to drill the hole through the nutplate using a #40 drill bit, then took the Z bracket off, and drill the hole to #12. The holes are slightly off center, but it should be OK.
Then I finished deburring the ribs, and clecoed them to the baffle, started final drilling rib, baffle, and Z bracket together. I didn't drill the most outboard rib together with baffle and Z bracket because there is no access to it (I can't remove the leading edge), so I just drilled the baffle and Z bracket at that location, and will drill the rib together with the baffle. This should work well.
Fuel tank skin to leading edge skin fitting, top side
Fuel tank skin to leading edge skin fitting, bottom side
Fuel tank skin is clecoed to the baffle without ribs
Showing fit between the fuel tank skin and top wing skin
Ribs are fluted
Ribs are clecoed to the baffle and Z brackets for final drill
The most outboard Z bracket doesn't get the rib. Because the rib will block the access to drill the holes. The baffle and Z bracket will be drilled together, the rib will be drilled later on with the baffle
Rib/baffle/Z bracket are match drilled, except the most outboard rib
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