OK, I've accepted another job. I think this one will stick; it's not just a guy in a warehouse this time. And the boss has been very straight-forward and responsive, so no flaky crumbs here.
I'm glad to get this job. Not only does it sound like fun, but I think it's good for my karma points. I will be building ecological equipment (mechanical canaries for the planet, as my father-in-law observed) instead of, you know, bombs. That's gotta count for something, somewhere.