I took the original file, and I:
- Scaled the X axis down a bit (so he's somewhat less wide);
- Added 5 magnet pockets at a height of 0.4 mm, (for ⌀8 x 1.5 mm magnets, picture attached. If you don't want magnets, just print with supports in that area);
- Added a rudimentary air channel, so the air exhausted by the GPU doesn't end up obstructed. (There's also a file without that air vent, if you prefer that.
Enjoy!