Most trailers only mount on one side of the bike but have an offset to the trailer arm whereas my design has a permanent arm attached to the bike with an offset which puts the hitch point directly behind the wheel instead of at the side.
Having the load point directly behind the bike really makes the trailer stable under load and at speed and I can turn the bike and trailer around in very small circles as I can turn beyond 90 degrees in either direction.
The extra strength and lateral stiffness of a stainless rod over flat bar stock should make it possible for me to use a single non drive side mount and if not...adding a stabilizer will be rather simple.
I'll update the pics when I get the new attaching arm built and attched to my new tow bike since that lovely Kuwahara has since become a fixed gear.