Cool mod indeed! What could a Sega Genesis or Master System look like? My Genesis is still running fine, so i wouldn´t want to cut it up yet...
I looked the cooler up on Amazon, it´s got a fan in the back. If you look at the pictures very closely, i think, you can just barely see the fan shining through in the back. Excuse me if i´m stating the obvious... Hope You´re all better now Neil!
Olli