Hello everyone!!! I´ve done plenty of optibay installation in MacBooks, but not in iMac, although I have opened a few for other repairs. My question is that I have to install an SSD in a Mid 2010 27" iMac, and researching on the net, I´ve found these dual hardrive kits, that come with a sata cable and a power cable, and you just glue the ssd with tape in the location of the optical drive. Another easier method is installing a 12,5mm optibay. My concerns: 1.- Why are there these two possibilities? will the optibay work properly just with the sata connection and no extra power? 2.- Can I use the regular 9,5mm Optibay used for macbooks, or do I really need to purchase the one of 12,5mm? Thanks a lot in advance!!!