I applaud the effort to try this yourself. For $100 - $150 you can grab a higher diff ratio LSD on this board. I just got a 3.73 LSD for $100 and prior to that a similar ratio LSD was on sale for $120. Grab it once you see it otherwise it'll be sold.
I've had experience with setting up gears in a GM 8.5" 10 bolt rear end and its not fun. Its hours of painstaking work and even then you're not guaranteed success. Even the pros shudder at this.
It reminds me of my recent CV boot replacement. Its just too dirty and demanding of a job to do properly and cleanly. I'll leave it to the experts next time.
However, gotta try once!
09 Jetta CleanDiesel M6 Highline
85 325e M5
07 Honda Shadow Spirit 750