So, regarding this octopus of cables sticking out of the back of my Mac...I'm thinking that I have a possible idea but it would require fabrication. Consider an aluminum bracket (same finish, etc.) that attaches on the top back lip of the Mac Pro and via magnets, connects down the back of the Pro on either side of the connection ports. The back of this plate would bulge out sufficiently for anything that's plugged in, allowing the cables to bend downwards. Essentially, everything would route out near the base in one clump of cables. It would be easy enough to remove for the power button, etc. Could this prove useful?