So they arrived 4 days early yesterday. Great but, Register the S/N which then creates an account which then generates an xps calibration file but nowhere to explain how or where to insert that, then a link to usc software on a different site with redeem code, whcih then creates and acc and linl to download. Installed it tried to authorise which it did and has the hardware ID , but not activated lol. Today decided to screenshot they error messages etc and was about to send when I decided on the usc website to go the offline route. Got immediate file which I dragged dropped on and it authorised and registered. Like no explanation! Now have to figure out the xps file. Weirdly there is no L and R on the H/P except you face the jack socket to front, but cable is wired with both red cables not a L or R to a stereo jack. So how does it tell which is which? Might get round to using them soon ...🥺🙁