Hi
Cheers for the reply

The guy who makes them does them for cars, so he doesnt really know what the best set up for something like this is, but if i go to him with a design, he can make it

The ones he has shown me so far look very similar to the thermochill 120.2/120.3, but obviously cheaper, but if he is making them for me i want to do something different
Thinking about the most likely layout of the radbox, i think having a barb at each end, as you said, will make it harder to place.... so res->pump->pump->rad seems a good idea....but will it give as good performance as
........pump -> rad
res->....................>-cpu/etc
........pump -> rad
?