This is awesome, all.

I missed in the thread where PBSF was defined. Sorry to be knob, but what does this mean?

(And just in case anyone was concerned that I am currently imperiling the tots, the trailer (and my bike) is covered in reflective tape, has two Planet Bike Superflash lights at about chest height on the rear, and two flags. This is all fine for daytime but I want more for the winter. And I live in the city proper, so traffic is more controlled than in a suburban situation--one way streets with a decent network of bike lanes in center city, 4 way stops on every block in the neighborhoods. Any after dark biking with the kids would be in the neighborhood, just getting them home from preschool.)