Update for 13" MacBook Pro users: I currently don't recommend buying the upgrade when it launches due to the modifications required. The 13" MacBook Pro requires the removal of the subwoofer, modification of the bottom lid and original AirPort bracket (as described in detail with photos in this thread).
I will be working on a 13" MacBook Pro solution that will hopefully require no removal of the subwoofer and grinding of the bottom lid.
The AirPort bracket will still need modified, but that is very easy to do. The only purpose of this is to retain the bottom lid screw mounting point, which is integrated into the AirPort bracket. See the post here as to what I'm talking about:
https://forums.macrumors.com/thread...y-here-for-cmbps.2171056/page-4#post-27290649
The reason why I'm posting this is because I would dislike for someone to buy the upgrade for their 13" MacBook Pro and then when I come out with the better solution, be upset after they cut into their bottom lid and removed their subwoofer.