I took the back off before I'd even powered it up! Not difficult - just seven very tiny torx screws (note that the back three are captive and don't need to be completely removed) and a bit of pulling. Irritatingly the M.2 2280 slot has a sticker over the screw so I've left the supplied drive (which is WD) there. I had a 240GB SATA M.2 2240 with both keys so I popped that into the spare slot and it was recognised when I switched on the PC.
I've now powered it up and it comes with W10 1909 so there's a load of updating to do. That's a job for after lunch.....
I've now powered it up and it comes with W10 1909 so there's a load of updating to do. That's a job for after lunch.....