@MadMatt Just curious - is your object stationary or constantly moving? We use a stationary tracker to map a real-world object and often have issues with getting precise values for rotation. There have been confirmations from HTC that the Tracker demonstrates inconsistent drift if left stationary. Quick Calibrate will help with orientation relative to the HMD, but most likely not doing anything to Tracker Calibration. Have you run 'sensorcheck' in "lighthouse_console" to see if all your sensors are working?
@VibrantNebula @Dario @chengnay