Hi there. I've recently upgraded my MacBook Pro with a new SSD, which I just swapped out with the old HDD.. I then proceeded to purchase a caddy to fit the old HDD in the optical bay, install has all been fine. But I was just wondering, should I put the HDD back in its original position and put the SSD in the optical bay? I read somewhere that it is safer to do so (something to do with motion sensors or something?) Any help would be much appreciated.. Regardless, everything is working fine, fast, and nothing is over heating. No issues at all. Cheers.