Before I built my refrigerated cabinet this was one of the cooling ideas I was going to try, I took a cooler master and removed the top 2or3 fins, cut the tips of the copper tubing off and epoxied refrigeration fittings to the tubing, then the idea was to connect two of the tube pathways with hose and run the the remaining 2 to the water pump and radiator, but after building the cabinet I mothballed the Idea but here it is If anyone is interested.