Unreal control rig for an FBT VR character

I have a pretty in the weeds question about a VR scene I’m making. I made a plugin to enable native FBT support through steam VR. And the FBT plugin is largely completed and functional. However I am having some serious problems getting the FBT’s to actually move the control rig correctly. The control rig is being controlled by captured poses from the composed locations of the skeletal mesh sockets and the Motion Controllers world transform and then being made relative to character mesh. I am having a lot of issues with basically the entire pipeline. Any insight is greatly appreciated.