Gear diff
I know there are a few ways to build the v2 gear diff but I thought I would share what Kiyo told me. Unlike Jilles Kiyo does not sand the big gears, instead he just trims them and makes sure they are properly deburred. On the inside he uses 5 x 0.1mm shims, 2 on the short outdrive and 3 on the large side. I built my diff like this and it felt a bit geary at first but once run in it was fine. Do not use the big kit shims because they will cone and make the mesh too tight, instead use the ones that are included to shim the axles. They don't cover the whole oring but that doesn't matter.
I also spoke to Jilles about his method, he said in addition to his YouTube video he's now using 2 x 0.1mm shims on the outside of each of the outdrives. This removes any slop and the chance that the gear diff mesh could tighten up when under load from the suspension.