I don't get it. (oh well, a little)
If you have a heatsink on the PSU, and it is not life (!!!) why not just use that heatsink? run a tube over it, and off you go.
I'm realy impressed by all the modifications made to WC this antec, but was/is all the hassle needed?
I tied to WC once a PSU also (also Antec, as it makes to much noise with the crappy fans)
It worked like a charm, untill I was not carefull with attaching the hoses, and created a short

That was the end of my 125 euro PSU.
I now have a Nexus, who is silent, but I'm going to watercool it anyway.
I will first mesure if the thing is not life.....