Well this system has major issue.
So it has 3 evaps (CPU and SLI/CF setup) and single compressor.
Let`s say you`re priming your CPU but GPUs are in idle mode. CPU produces alot more heat than two GPUs. So CPU will make gas evaporate faster meaning higher pressure in CPU`s evap. This means that gas will move to evap with lower pressure, resp GPUs` evaps when they don`t need that much.
Of course if heat dissipation of each source will be equal or near that such problem won`t exist.