To be honest, I don't see a reason not to do that. You might ask for a qualified opinion from the PSU Forum.
I have a thought, though, that may go towards the professionalism of your build. You could purchase a terminal strip, something with 16 - 24 screws, bring the power into that, then connect the 8 outgoing molexes. You could mount this to the backside of the tray.
Maybe not something to do today, but down the road?
Except dubstep & drum and bass, which sound like they purposely made them to make you want to commit suicide instead of listen to that crap. It really makes me feel like someone's bashing my head in with a sledgehammer.