[Azriel]

I'm going to put 2 1/4" barbs in the reservoir for return lines from the chipset and VGA coolers, and just connect them to each other until I add them. I don't think it is wise to T the returns back into the main return line. Imo, this would cause the water in the smaller lines to just sit as the flow continues through the 1/2" circuit. I think it would be best to split the 1/4" lines out of the output up at the reservoir where pressure is at it's best, and let the 1/4" lines return to the reservoir without passing through the heater core.