my lights died again after everything was put back together. I pulled the fuse box one more time and attacked it with my test light. Couldn't get strong continuity through one of the holders, so I went to West Marine, bought a couple of heavy duty fuse holders and 8amp fuses, and wired those in and removed the original fuse box entirely. Everything is solid now. I can't see whats physically "broken" with the fuse box, but something is not letting the juice flow.
Went out for an hour last night, everything is AOK.