[Krawlin]

Just something else to keep in mind if this does work out and you want to improve the system.... a pump capable of moving more liquid volume isn't always better, just look through some high performance engine building forums or 1:1 car forums and you will learn that this is 100% true. If you push the coolant through the motor/engine too quickly, it can't absorb the heat, it just flows through and does very little to actually cool the motor/engine. And considering this is going to be such a tiny system, if you don't get the results you hoped for at first, try to slow the pump down some and see if it does any good. The system boats use is just a simple force fed system, and is rather tunable with water inlet/intake sizes, and adjusting the pump speed essentially does the same thing here, or run some kind of restrictor system.

Sounds like a fun project, would be cool if you managed to pack this into a small and effective enough system to be considered practical.