On a side note, since I had been upgrading my 120GB SSDs to 256GB SSD's I had 2 sitting around.
I picked up one of these on a whim
»www.amazon.com/gp/produc ··· _s00_i00
And it works. I know, shocking. On my rMBP with USB 3 I see 200MB/s in disk throughput tests, good considering one of the SSDs is SATAI.
Great thing is that it IS bus powered. It's about the same footprint as my old Galaxy S WiFi 5" about about 1" thick.