Is there anyone here who can help me with geometery questions? I'm thinking about making leading link fork for my outfit, but I'm not sure how much or little trail I should build in to them. From looking at various different types of sidecar forks it's unclear as to the correct amount the axel needs to be moved forward. Some seem to have as much as six inches and others seem to have no more than an inch. Why might this be? I want the steering to be light enough for my other half to to be able to ride the outfit easily, as well as being sutible for mild off road use. The outfit is an R80 with a Velorex chair. Your advice is much appriceated. Val.