G'Day from Australia, I am looking to upgrade my late-09 iMac to a dual SSD setup. I have already done the RAM upgrade (32gb), and the machine has already been into Apple for the replacement Seagate drive. I have read the tutorials on how to do both a replace boot drive with SSD and a dual drive upgrade I have come to the conclusion that I do not have the skill to tackle the screen part and associated wiring related to LCD, however I am able to do the basics, such as cloning my HDD and connecting the SSD to adapters and so forth to make things easier for the technician who will be installing it. As such, I have enlisted the services of a third party repairer who is willing to perform the above if I supply all parts. Currently I have the following: 2x Samsung 850 EVO 1TB SSD And will be purchasing the following from OWC: 1x NewerTech AdaptaDrive 2.5" > 3.5" bracket 1x OWC In-line Digital Thermal Sensor for iMac 2009-2010 1x OWC Data Doubler Now I was thinking is there any other parts that I will need to supply? Obviously, I would get the original seagate HDD and optical drive back, which I will have hope to have enclosures waiting for the moment I get home. Now I have the following questions: Has anyone tried to do this Dual-SSD setup, and how did it work out for you? Also what enclosure is recommended for optical drive 12.7mm thick? Correct me if I am wrong, the optical drive temp sensor is removable, and can be stuck on the SSD when mounted.