Hello Ian, I thought the site might be more active than it has been, after my one post a year ago I see its still the last one in that thread, so I stopped looking. It does seem to be warming up a bit so I will stop by more often.
Side car set up Ideal: 1/2" negative trail, 1/4-1/2" tow in over 6ft, chair wheel about 10-11" forward of the rear wheel.
When I reached the ripe age of 16 my first bike was a BSA flat head with sidecar 20 quid maybe another 10 for the chair. I guess I have always been hooked but the support structure has disappeared. In the late 50's the Triumph dealer in the "Sandpits" area of Birmingham "H&L Motors" carried triple trees to adjust trail, lower gearing drive sprocket, stiffer fork springs, and friction damper if not fitted.
They also carried re bored cylinders with pistons, re lined brake shoes, straightened fork tubes, reground cranks ready to go. They would send out frames to be re set, and body work for paint.
On another note next door was the jewelry quarter, where not that long ago an aficionado engraved a verse from the Koran on the edge of a razor. working at night so as to reduce vibration from traffic, he worked between heart beats, and being an old building the odd scurrying mouse which caused his heart rate to speed up. We should all have dreams.