@tukuruko I tried this but it started messing with my clothing toggles, I would switch to a different outfit and the outfit would switch in the mirror or in my camera but not when I physically looked at my avatar.
For this test i used a new Unity project (2022.3.6f1) and just manuka v 1.02, liltoon 1.7.2 and Thrys imported nothing else.
FBX import (from the new project) into Blender 4.1 and export again, no changes made.
I asked a friend of mine to reproduce it, and he get the same problem.
Maybe it's just the Thrys Avatar Evaluator that outputs incorrect values. The Values in the VRCHAT SDK Panel are the same as the original FBX