Just took a look at the C1.
Flow through that setup is pretty crappy. 1 blade will end up hotter than the other. Should have y'd the connections so they both get equal cooling.
Is this better?
SC-ANTS3 COOLING KIT Can't see where it connects to the blades so I can't tell for sure. I suspect it is the same as the C1.
It needs to come out of the pump, go through radiator, y off with a tube going to each blade. The outlet of each blade then needs to y back to a single tube and return to the other side of the pump.