@Crysis_gamer - thanks for that reply. I've been thinking next time around I should just change the wire colors themselves, but how do you keep track of all the different wires if they are all the same color? Also, are you building extensions for people, or are they the sleeving straight from the PSU?

I've always wondered about extensions as it seems more practical without needing to mod the PSU, but then what do you do with the massive cabling from the PSU, like where do you hide that? It seems the most efficient way is to mod directly the PSU, but then that raises another issue - if you custom length the PSU, what do you do later when you switch cases ? Get a new PSU? Or just do it all over again?