On my first Morgan, a Roadster MK1 I had later added Panhard rod. Control in curves was way better but the cruising comfort was reduced. Much more hopping from the rear axle. On two Morgans after I waived the Panhard rod. Now the P4SS has it anyway. It´s very well integrated and seems to work without loosing comfort. And control is way better. A Panhard rod could be way to go but I would recommend to experience it first - on a so fitted Mog before you spend the money on it.
