Yeah, the Kerscher 'coil-overs' are adjustable McPherson struts! and are proper bo! They use Eibach and Koni consumables.
I had the crack with Leda at the NEC Autosport Show last weekend and there double ball end, dial adjustable spring hieght and damping option does look a fantastic prospect for the back of my '03 and the price seemed so good, I can't remember it. Are you getting your coil-overs from Leda direct? How much?
Matt