Thanks Alan - Will have another look at it today.
I did try and adjust the high and low compression - the outer dial did not want to turn (this is low daming as I understand) - I will spray with release oil and see later (did not want to force it as you say). High speed adjuter is labelled #3 in illustration but is refrred to as #6 in text.
Adjusted the rebound on bottom of shock - also very difficult angle to get to (illustration shows it on opposite side to chain which it is not) and it was turned right in.
Started adjusting the spring by tapping lock ring loose ... very difficult to get in there with spring spanner so yes will probably tap it to get adjust.
Thanks again for input.
The clicks they mention in the manual are the fast and slow damping settings (those two dials) if I remember correctly the outer one is slow damping and the inner one is fast. They should both move (but be careful of applying force they are only brass). I fiddled with mine when I got it and then left them once I was happy - cant remember what I set it to. (I vaguely remember setting it all to zero and then going one or two clicks in on the high speed and one click on the slow speed).
I think there is a rebound damping screw at the bottom of the shock but I didnt fiddle with that.
Blazes would probably give you the best settings.
As far as adjusting the height goes - you need to adjust the preload on the spring. I used a big screw driver and a hammer to tap the locking rings, worked much better that one of those C spanner things which just slipped off all the time. You need to basically just set the sag for your weight.