Hey, anyone following this thread or just happen to be here, just read this, it won't take a lot of your time I swear, but for the sake of your mac, please read it.
Apple isn't lying when they said do not get a palm guard, the design really is like what they said it the support notice.
I've done a little experiment by myself to prove this and I've found out that the retina screen rests perfectly on the keyboard, as well as the palm rest, and there is no room for anything in between. Here are the experiments I've done. I used a needle to see if the retina display was vulnerable to scratches, and it is, I merely touched it and it made a mark. Then I went on to my second experiment, you guys can try it if you want. I placed a coin on my keyboard, closed my lid, and shook my mac around, couldn't hear the coin sliding around. I opened it and the coin was exactly where I placed it on my keyboard. The screen was literally pressing on the coin, which means it could be either resting on the keyboard when the lid is down, or the space in between is less than the thickness of the coin. Good luck guys