Towing a Bike Behind the Xtracycle

A 5 minute solution to towing the kids bike to the park - we don't trust him in traffic.

I have a pile of ancient random car bike racks, and with the addition of a seat post shim, I was able to mount an old fork mount to the rear-cross piece of the Xtracycle.

I wonder what the tongue weight is - it says "no step" so I assume its not much. I also wrapped the quick release with a small bungie cord.