>>392772805
>if I only have 3 extra trackers, where should I put them?
the most common configuration for 3 trackers (or 6 point tracking) is feet and hip.
After that, the most common setup with 8 trackert (or 11 point tracking) is feet, hip or chest, elbows and knees.

I've read a lot of articles on 11 point tracking and seen a couple of videos and when we talk about "immersion" the biggest jump in immersion is from 3 point (headset and controllers) to 6 point (+ tracked feet and hips).
Adding knees and elbows is nice, but won't give you that big of a boost in immersion, as the initial one.
Also keep in mind that, the more tracker you use, the more your avatar needs to have your proportions in order to feel "natural".
This already happens with only 3 additional trackers with certain characters.
tl;dr the more trackers you use, the more you will notice wrong proportions