Clamped the grill onto the top:
drilled the screw holes:
Drilled some pilot holes, for the jigsaw:
masked the whole top, to prevent scratching:
Fan holes have been cut:
and the grill fits perfectly:
Those are my dad's legs you can see.
Here is the top, back on the case, with the radiator installed:
with 5 of the 8 fans installed.
I still need screws to put the three others on the radiator.
Inside the case, looking at the top:
Next step is to make some holes, for wire management.
With a case this good, it'd be an insult to have bad wire management.
you can't really see it, but there is foam between the radiator and the top of the case. It's a pre-cut piece of foam, that came with the radiator.
The screws are a bit long to attach the radiator directly, without damaging the radiator core.