I have too much problems with head tracking atm, it is almost impossible to play anything because my headtracking system always drift, even if you fly simulator for 5min it drifts for 45 dgrees left, it is so annoying and ruins whole game experience, pimax please do something to ease this, maybe some button you can press ingame to reset zero point, would be really appreciated 
Hi, thanks for your suggestion.
Please try to update your Piplay & Firmware version to latest.
Or communicate with me by Skype: support@pimaxvr.com 