Nice, I hadn't seen those before. I just ordered one for myself. I'd been debating ordering a Bob trailer, but I have 3 bikes and none of them have a regular 135 mm skewer in the rear, so I would have had to build up an old POS frankenbike just to haul it around. The builders pack solves that dilemma.
I'm not sure I can get out Saturday now either. Possible in-law obligation.