Now I actually have some understanding of how it works thanks to your link it does seem to be a decent system,
I must be trying too hard I've managed to get both to jump
that was with runflats and 170 bhp which probably didn't help, got some nice Contisport 3's on now my god the difference is massive, no more skating round under power off bumps and ruts in the road...
Indeed probably the RFs making them jump. The standard SS+ springs and dampers give a pretty harsh ride. Especially near 100kish when the dampers are getting tired.
One of the first things I did with mine was ditch perfectly decent RFs (two were almost new Pirelli PZeros and the guy had just paid £130 EACH for them, yikes!!!) and put proper tyres on. As you say huge difference.
The other things I did fairly sharpish were:
1) Got it properly aligned on a Hunter system (which KwikFit have but it's hit and miss if they can use it)
2) Changed the lower arm rear bushes for the Powerflex polyurethane ones - PFF5-101. Again my OE rubber ones were OK, not an MOT failure or that worn. It is counter-intuitive, but in addition to greatly improving steering feel, accuracy, turn-in, they eliminate most of the crashing on the bigger holes. Recieved wisdom is "poly = harshness". Which I was expecting. To my amazement they had the opposite effect.
Another HK saved!! Well for the moment anyway. I really like mine. Once and if you get an aftermarket exhaust and decent cold air intake (CAI), so you get a lot of SC whine, it does get less important.
This Youtube vid is an R53 with an Orranje Stealth CAI fitted, same as the one on mine. You'll see my point. "It's all about the whine". https://www.youtube.com/watch?v=FeYg-iG2Y2g