Basically, I can’t get the first silver screw in to the top right corner. It seems that the mounting point is about 2mm off.
Not sure what to do other than some glue hacks which I doubt would be good for the board…
It turned out to be the power not fitting in the hole designated by the case, it was about 1mm off from slotting in naturally.
I ended up routing it a fraction and now it fits.