I have a new 2012 macbook pro NON retina. Im thinking about installing a data doubler in the optical drive. I currently have a 256gb SSD in the main bay and thinking about putting a 500gb/1tb standard drive in the optical bay. Is there anything I need to know about doing this? Any problems/issues that might occur? i.e data transfer rates/heat/noise etc... Can anyone recommend a good make data doubler in the UK? Also is there a way to use the optical drive externally?