I've been kicking around another Mac mod project for a while, which will likely be abandoned but I'll look into it anyway. I have a 15-inch g4 iMac hanging out being pretty in my room and want to pop in a mini itx board, bring it up to date. There are two issues here. 15 inches is pointless. It was too low when we bought it, it's too low now. I can rectify that by watching Craigslist for old G4s. The space inside the base. Is there any more space in the 20-inch model's base than in the 15?