Hi DJ,
to explain some what i have been babeling about, some sketch and model in cardboard
you just re-invented the 4-bar-linkage steering system, that Michael Rienstra from California proposed about one year ago.
Michael even built a prototype that he called "Vython":
http://www.python-lowracer.de/pics/Michael_Rienstra_Vython.jpg
Later he run out of time, energy, money or motivation and so we do not know the result of his experiments. Hope he did survive the test ridings ;-)
The virtual steering pivot surely would produce positive trail, resulting in a Tom Traylor style geometry. The steering system to me seems quite complex and vulnerable.
Also I am still wondering if a pivot axis that is not going through the hips causes steering/pedalling perturbances.
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