Still no closer to making A-LSD a "good" LSD, I could only find an exploded view of a Z32 300zx diff at my local, Nissan dealership. Assuming that these are primeraly the same diffs + hydraulic actuators, shimming will help, but not solve the problem, as Matty has pointed out, these are hydraulically actuatted and not mechanically. I have my car booked in at a hydrualics workshop over the weekend, I'll keep you posted on what they find.