Installed header tank. Feed lines extend too far outboard. Interfere with fuselage top. Trimmed tank top and outboard side but continued to find new interferrence. Cut off 3 feed lines and most of top. Trimmed outboard side down 1/2 inch. Released fuselage top and remaining top of header tank. Layed in 2 bid patch. Clecoed on fus top. Fabricated 10 bid, 2 inch wide support extending 3 inches onto outboard tank bottom, up outboard side and onto (released) firewall support.
Bad day. Much work on header tank now needs to be redone.