I'm still thinking about the reason for the fairly low flow - and even though I'm happy with the temps I'll try to improve it.

1) Stop fittings in the GTX 480 blocks.
I think now that all the stop fittings in the EK blocks must reduce the flow as I feel they go a little bit further than the thread in block ends.

Soon the new Liquid Fusion should come which means drain + refill anyways, so at the same time I'm going to add 1.5mm spacer to each GTX 480 block & SLI link inlet/outlet and will replace the regular stop fittings with low profile (I need to do this as with the spacers the regular wouldn't fit).

2) Flow meter
I have to open it and see whether this is cause of the clicking.
There might be something in it and if it's clicking it would reduce flow too so I have to check it

For the other components I'm pretty sure all is as good as it gets.

3) Fan control.
Need to find a good way to control all those PWM fans.
Currently I control top 6 through the splitter and mobo, not sure yet how to control rest yet - any ideas welcome!

So 1.1 coming soon
I think I'm hooked for life with WC now