VR Expansion Plugin

So I figured it out and it works for what I need however I had a question. Im trying to add functionality where the character can bend over but the whole body doesn’t follow not sure how to set that up since all I have is the hmd and vive hand controllers. Do I need a waist motion controller? Or is there a way around that. For some reason it wont let me post the reference images. it says they are too large. Let me see if I can add them later.