I would add that this is the only forum for vintage sidecars in North America that I am aware of. If the people involved in the sport feel they have nothing to say on the forum, this does not mean there is no interest.
Since My Boyd has a large garage full of old bikes, and has been involved with three wheels for a number of years, maybe its time for you to bring out a P2 chair and swell the ranks ?
I think it is a little easier to fall off the moderns although I haven't yet.
I did say yet.
With the vintage you have that darn chair wheel to contend with that will
help you stay in the rig or run you over