Mark, you recommend the Lulls, ja? Do they fit a Bicentennial too? My 86 TB II Japan only mini series bass (the one I got from George) is nearing the end of its days pickupwise (that particular Bicentennial sidewinder was never strong to begin with, weaker than my 76 Bicentennial certainly and that is not particularly strong either). The loss of volume is dramatic (comparable to a Triumph now in low impedance mode) though it does have the charm of making that bass sound sharper and clearer - P-Bassish in fact - than any other TBird I own, including the Blackbird. But the end is nearing I believe. I'll have the sidewinder rewound probably (or remagnetized?) but that is going to change its sound for sure so I might just as well try a Lull.
Repairing pups that still work, but are in a state of deterioration is tricky. I once had a Junior EB-0 (from Dave) with obviously a broken pup, it was all honkish, out-of-phasish and sounded different to any other mudbucker I had, lovely! Eventually it fell out completely and was rewired and now my 61 EB-0 sounds authentic, i.e. like any other mudbucking bass of the era. Duh!