ZoSo58LP, that '89 Strat has a roller nut, right?
EDIT: The Strat Plus models from this era have a Wilkinson roller nut, not a Fender LSR - see ZoSo's picture link in post #11 below.
My '91 Strat Plus is set up exactly the same way - with a roller nut, Fender vibrato tailpiece, and a Hipshot...