Riveted the sub-panel parts together per the instructions. Clecoed the completed subassembly in place. Test fit the Lightspeed mounts only to find an unexpected interference with the brake lines; I'll have to reposition them and make new mounts, once the main panel is in place to ensure that I don't interfere wth any avionics.
Rivet count: 54 Total: 15695 - Plus 549 done at Van's