FBT works well even with physics in Bonelab, for example. I do feel that VAM is floaty and lagging behind my real moves like I have the avatar attached with some ropes instead feeling like inside the avatar.. but the main problem is good calibration, I can't find an option to easily attach all 5 trackers in a T pose. First, there is no T pose in posing, second, avatar is flopping around, I need to freeze it in T pose for attaching well similar to the VRChat's calibration. Attaching head, hands, hips and legs separately is like super dumb and frustrating way of calibrating FBT.