Camera Calibration Reprojection Error Nodal Offset

I’m trying to setup a small virtual production system with a green screen, and I’m having trouble getting a useful result from Unreal Camera Calibration’s nodal offset calculation.

I’m using vive trackers directly connected via LiveLink. I use a checkerboard, and have tried tracking the checkerboard with 1 vive tracker, but the reprojection error is always huge and I can’t figure out how to improve it. Any suggestions on improving nodal offset calculations?