One of the few highlights of the refreshed 27-inch iMac is the new SSD option for its second drive bay. This sure is good news for performance addicts carrying some spare cash, but with the 256GB SSD addition costing from $750, some may prefer the DIY route to save a few pennies for that gold iPad. Sadly, it won't be as straight forward as sliding in a new drive -- e-tailer OWC noticed in its teardown that you'll be needing a mounting bracket and a couple of cables that are only suppli
