I decided to go with a single tier design for the brew system. Having the heat exchange and the mast tun on the same level will improve the potential of the pump. I have a 1/40th hp circulation pump and I am a little worried about how well it will perform.
In this schematic V1 - V5 are valves and P1 is the pump.

I've also made up a list of system processes and corresponding valve configurations, I will post those later.