Thanks for the info guys,did the job this morning.I think the problem was the unit hadn't been off for so long, if at all, that it was very tight on the lugs.On a lighter note i didn't lose the screw but i did manage to push the trim button right the way through when i'd finished(the one i had just ordered from main dealer).Had to strip down half the boot to find the little ****** but with a long nose pliers and torch he's back where he belongs.