Cheers mate. Opening it up it looked immaculate and spotless. Updating now so fingers crossed!
Good stuff, I opened up both of my xbox one x's today (got 2 warehouse ones, I am sending one back).
Not too bad to open, a bit of a maze but once you know how it all goes together it makes sense. I would not open a new one though as it can void the warranty.
Did a quick SMART check on both drives. The "used - like new" one which had large scratches all over it, and was missing the game it was meant to come with, had been powered on for 1k hours.
The "used - very good" one, which was actually in better condition than the other one, had 800 hours powered on time.
I am planning to keep the "used - very good" one, so I swapped the thermal paste on it to use some Grizzly stuff I had lying about, then I swapped the PSU/FAN from the other one as well as the fan did seem a bit quieter on the other console.
So far so good, all went back together, except for one of the long screws didn't quite fit back in for some reason, so I left it out.