The huffy bmx has a thick chromoly seatpost that bottoms out in the seatpost tube and makes for a very strong frame.
It makes for a very secure attachment for the copilot, but the second copilot needs a secure connection to the first copilot.
I'm going to make chromoly seatpost to strengthen the connection between the copilots.
My new goal is to haul all three boys down the road.
I did a ride early in the afternoon with the boss baby and @theharvey.