While this is at the top.
Just got done rebuilding two new diffs. One is built with gv2 rings and the other is built with associated rings. Going to see which one stays smoother longer. Both are built exactly the same way.
For those hesitant to try Ass. rings, don't be. Was a lot easier to glue up then expected and just holding the rings in my hands they seem smoother (if thats even possible).