Backpack bone isn't same as vanilla and cause abnormal movement

Hello, vanilla backpacks follow the movement of the spine_fk.005 bone to make it follow the movement of the body armor, I don't know what bones the RHS backpacks use but I assume they are the ones used for the belt, spine_fk.003 or 002, or maybe the spine_fk.004 ? This causes the backpack movements to slide abnormally on the body armor when the backpack movements should be a consequence of the body armor movement. I know this is a minor issue but it should be easy to fix, I would be grateful if you do so as this causes an anomaly (still playable) with my custom character animations, I spent a lot of time on these animations made from scrath and made firstly for the amazing RHS, and I will probably continue for a few more months, even if you don't fix it, for free because I fell into this passion. I am attaching two clips to compare the vanilla BP movement to the RHS.

https://github.com/user-attachments/assets/5138b540-f2fb-4ed8-ae28-bac9f76cae28

https://github.com/user-attachments/assets/d47006d3-16ed-4db6-8ec4-9ed802e9dda8

RHSMODS / statusquo

Backpack bone isn't same as vanilla and cause abnormal movement #984