Any body on this board uses 4 core radiator? Mine is 3 core and I'm thinking of making it 4 core. I want to make sure its worth it. Because as I understand they will have to use smaller diameter pipes, to accommodate the maximum width of the radiator (approx. 2") The 3 core radiator will have larger diameter tubes than the 4 core. Since my 3 cores already accommodates the maximum width of the radiator. So is 4 smaller cores better that 3 bigger diameter cores and why???