RideTech Triangulated 4 link, upper bars?

[exwestracer]

Ray, the Milliken's define the upper link convergent point as "lateral restraint point". The roll axis is a line thru that point and parallel to the side view lower arms (for parallel lower arms). The roll center is where the roll axis crosses the rear axle vertical plane. The problem is that the roll axis moves with the lower arms and to have some roll understeer the lower arms must slope down to the front of the car. This puts the instant center very low.
Having the upper arms converge at the frame mounting ends can result in some weird roll center positions depending on their side view angle.

Thanks, Larry. I was thinking solely about the links converging at the axle. Shouldn't be posting from work anyway! LOL