I have a single external monitor set up for my MBAir that runs in clamshell mode - and I'm wondering if it would be possible to have a second monitor connected while it's in clamshell mode. What I'm aiming for is a landscape monitor for the visual end and the portrait monitor for "code mode" so I can see the bulk of the PHP doc all at once. NOTE: I don't need to have *three separate screens* - that is, two externals and the Air itself; every question I've found online they all want to use two monitors AND the laptop screen all at once. I don't need this. I'd prefer them all connected through the Thunderbolt port, but if it needs to be done via USB I can do that. Better via USB than not at all. HDMI splitters, I'm guessing, won't do the trick - e.g., it can't possibly be that easy, can it? I'm just after two external monitors for my MacBook Air running in Clamshell mode. Is this possible without spending $1k on Apple Displays, and if so, What equipment would I need to get it up and running? Thank you very much in advance!