After everyone's for your suggestions I had to do some major modifications to my Jetrike plans.
The big changes include, . Regular python drive train to fix the chainline problems, . A Front derailleur post on the BB mount, . Stiffer triangulated frame . Stiffer seat mounts . 3mm plate on the rocker arm end caps . Improved tilt geometryI have come up with a much better simulation, that allowed me to isolate each parameter and test its effect on the self-centering independently. This gave me a much better understanding of what influences it the most. I plan to write a much more detailed email in a few days to report on what I have learned.
There is still the interaction between the front steering pivot and the tilting which I haven't a clue about.
I have uploaded the latest revision to my web site, you can download them here http://jetrike.com/Jetrike-Plans.pdf
I am off to get the materials today! So I will keep you posted. -h