THanks for the replies, yeah it took me so long to work out i had to adjust the spring tension via the claw screws lol got there eventually mind you, and now its still not PERFECT! but ill have another crack sometime soon, i must admit though, as much of a pain it was, i really did enjoy it! :D

I guess that always helps things along as well :)

PS> The ZR is lovely, very smooth and a neutral Zero point (which is adjustable via a thumb screw on the back) :)