Thanks! I'm In Colombia, so can't really send in my diff. My diff is from the R420 racecar, so I believe it has the sintered plates. Can't find much info on rebuilding those. I bought parts from a 485R to swap the drivetrain to mine (propshaft, bmw LSD Diff and driveshafts) but it's quite the project, since I have Sadev and 485s came with manual.
Mine was a racer and have been trying to tame it down for mixed use.