Hi Mike,
if you look on the first page of this thread, there are my front forks. I bought it with the bike. Usuely is on the RE forks only main spring, but on this forks are two small side springs. Mybe somebody calculated with the sidecar.
You are right that ride british bike with sidecar on another side is quite problem.
The box on the sidecar outfit looks like as any ammunition box.
Now is my bike as solo. I have problems with the sidecar bars. I can slide with the bars and make good obliquity of wheels. http://czechlions.rajce.idnes.cz/09-08-22_Cihelna_09_-_sobota/#IMG_0395.JPG
Mike, many thanks for all information, will be helpfull for me in the next steps. :thanx: