I have a 2012 13" cMBP (base model), Superdrive caddy, and a Crucial M4 256GB SSD coming next week, and I'm looking forward to trying to put a fusion drive in there. Here's what I'm hoping to do: - Put the SSD in the Superdrive caddy. The 2011 cMBP's had problems running SSD's at 6G speeds in the optical bay, but supposedly the 2012 cMBP's fix that problem. I'd like to leave the original HDD in its place so it can take advantage of Sudden Motion Sensor feature. - Set up OSX on the SSD. - Create a Bootcamp partition on the SSD for Windows. - Combine the OSX partition on the SSD w/ the HDD into a Fusion Drive. I might have to reinstall OSX to do this cleanly, which wouldn't be a big deal. Has anyone had experience doing this, or know if this would not be possible for some reason?