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Tried to find some other stuff to do while waiting on some help. I fabricated the fuel pickup anti-rotation brackets. A lot of work for two tiny pieces of aluminum.
Julie helped me rivet the three nut plates onto the spar for the inboard-most fuel tank Z bracket. Of course after we went through this hassle, I read Dan’s site some more and he used blind rivets there. Oh well.
With the last Z bracket installed, I went to town. I back-drilled the inboard bracket through the tank baffle using the long #30 drill bit.
Removed the leading edge. Drilled the outboard bracket.
Removed the fuel tank skin and internal ribs.
Drilled the remaining brackets.
Re-assembled the fuel tank so that it’s now ready for final drilling.
I also worked on the hole for the tie-down ring. I didn’t like the method in the instructions of finding the hole. With the leading edge off, I marked the location of the tie down hole on the spar. Put the leading edge back on and transferred the marks. Worked great. Filed the hole in the right direction. Drilled it to #10. Filed it a bit more in the right direction. Drilled with the Unibit to 5/16″. I’ll drill the rest (7/16″ should be enough) with the leading edge off. I don’t want to screw up the tie down threads.