[robo]

The general consensus is caster should be between 5 and 7 degrees. But you need to take off the 10mm of neg trail in the upright or you wont be getting that in real terms. The upright. http://www.super7thheaven.co.uk/Sierra_Upright

I always thought it would have been better to have a fully adjustable top wishbone so there was the scope to dial in what you need.

http://trikingsportscars.co.uk/wp-co...wishbones1.jpg

Bob