Thanks guys, I do seem to recall that this issue has something to do with the spring carrier at the top of the strut, or something similar. If the suspension bloke can't find anything wrong then I might just get him to swap the L&R springs over and see what happens. If it is the spring then the car will lean to the left ....
Any thoughts on the best PU suspension kit? I'm thinking of buying one of this one:
http://www.ebay.com.au/itm/200660749056?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649