Just because someone did it doesn`t mean it was a good idea.
Dennis knows better too. If it were mine the spherical bearings in the "ears" would fly and be replaced with stock rubber,then the PHB could set the new RC height and you wouldn`t have 2 conflicting rear RCs. From an engineering standpoint it`s still a bad idea *but* we do have several customers running a PHB on the C4L (with rubber bushings up top) with good results in auto X and track day events. It may be a case of the wrong things,in the right combination for a particular car. I wouldn`t mind experimenting with it some time just for giggles. Mark SC&C