I saw someone else make a post about what I'm looking to do, but no clear answers were given. I bought a 11-inch ultimate that will be here on Wednesday, and now I'm looking to trade down to a different configuration. I know you can't return CTO Macs, so what are my options in this case? Do they allow exchanges like this, or am I stuck trying to sell it on eBay and get most of my money back and then buy the new one I want from Apple? Also, is adding 4GB of RAM considered a CTO if that's the only change I want to make? It seems like that when I go to order it online, but perhaps they would have a 4GB RAM model in my local Apple store.