So I made a chariot and it has a simple hitch that ties on to the seat tube. This is wrought with problems though, and I want to try building a hitch like the BOB trailers have. Should be pretty easy just using a rear triangle and a headtube off another bike.
What do you think? Does the pivot need to be exactly vertical as in a swing bike? If so, how can I make it work with my different wheel-sized bikes (700cc, 26", 16") as the wheel sizes would cause the pivot to be at different angles.