Frick if I know. Probably righty tighty brings the screw into the body, more pressure on the screw, and pressure goes up? Pretty easy to test when its running. Normally they're set at 5-10psi to start. Even if its set at max of 55psi low side, it won't make a difference.
I think I went a bit overboard height wise. Don't need that much! (Yay the cascade just got shorter!) I think I'll shave 2 inches off of her. Having the "low" HX in the center helps with the insulation of it. Normally -80 to -90C would require 3" of foam.
