The driver cooling system is free so to speak and can be installed anywhere. Lots of people put them in the back to put the weight there.

I built my own cooler system as well. Used an old coleman cooler with a small bilge type boat pump that I picked up for $15 at Walmart. You can get the fittings for the lines from places like McMaster. Do some searching online and you'll find several links to DIY builds. I'm using a Coolshirt and beware that the different shirts had different connectors. So know what connect the shirt you use needs.

David