True, but if it's way off you could damage the system (Compressors generally don't like it when they get flooded with liquid refrigerant.), and it might be overly difficult to build and tune correctly for someone who doesn't have much experience in HVAC.

As far as a low profile evap. goes, I imagine the any possible space savings would be far outclassed by the size of the insulation you'd need around the suction line.

This computer is going to be truly beastly no matter what you go for, so it's all good.