Well, no one has PM'd me and I finally have some time to write a few words having done some miles on the new setup. You can see the fitting and how the car looks now on my build thread on P26
http://www.350z-uk.com/topic/58750-how-to-smurfadise-a-zedsplitter-repair-p27/page__st__500
Firstly, as someone has mentioned this already, I haven't yet fitted the extendable rear adjusters.
Anyway onto the important part, initial thoughts at installtion were if they perform as well as they look then I'll be a happy bunny, Keyser and Bob who fitted them agreed they did look well engineered. No serious problems with the installation other than the usual obstinate Nissan bolts!! After much banter from Bob who celarly wanted me to "slam" the old girl we settled on a drop of 20mm all round, I have 19 inch wheels (no spacers) and there is absolutely no rubbing and no need to have the rear arches rolled which I really wanted to avoid. On the drive home from the Zed Shed I decided to take the A31 and have little play, nothing too arduous as the 4 wheel alignment hadn't yet been done but it was clear the car felt much improved and far more confident in corners, it was pretty good previoulsy as I have adjustable Motordyne ARB's fitted.
Since then I have had the 4 wheel aligment carried out at Kaizer Motors, the rear camber is now -1.4 both sides (was over -2.0 both sides) and is bit more than I prefer so I'm going to have adjustable rear camber arms fitted just to preserve tyre wear a bit more.
I've had a chance to push the car a bit now and I'm really pleased with the overall outcome, I have the damper setting at exactly half way between hard and soft for the time being, there are 32 clicks or notches between soft and hard, pleasingly those clicks are easy to feel through the adjusters. In summary the car feels a lot more sure footed and balanced in corners and I'm looking forward to getiing on some local B roads with a slightly harder setting. All in all money well spent as far as I'm concerned.