Just ordered an MFactory 1.5-way LSD for my car, along with new output seals, new ring gear bolts, Loctite 5970, fresh diff carrier bolts. Might order the E60 finned cover, but not sure yet...
I'll be rebuilding a donor 3.73 diff with the LSD unit, so the downtime will be minimal, and I'll learn a lot in the process.
I'm super excited for this, it's going to completely change the way the car behaves.