Hi there - I have a 5,1 MBP with a 128gb SSD in the main slot and a 7200 1tb drive in the optical bay, and 8gb ram. I'm running Mavericks. I love the SSD, but recently have been mulling configuring the setup as a fusion drive. My logic is: Right now the SSD is about 50% full. I have my OS and apps on it. I feel like OSX could make better use of the fastest space, putting my frequently used data on the ssd. I back up regularly with TimeMachine, and am not worried about increased drive failure risk. Should I do this? Thanks!