Getting in is relatively easy, providing you know where to look. You'll first need to remove the battery and take out all the screws on the underside (there should be 13 in total), including the one for the flap that hides the non-warranty voidable removable parts.
Once that's out, take out the 16GB SSD and the single DDR2 memory module - note if you want to upgrade you'll have to replace this DIMM with a bigger one since there's only one socket available in the 901. We're still keen to try this 16GB SSD in another notebook and we'd love to know how much of the 901's BOM (bill of materials) is taken up by the SSD.
To the left of the SSD slot and above the DIMM socket, there is the Wireless 802.11n module. Both antennas are connected to it - they run up and around the 8.9" LCD screen.