So in using a CO2 brine secondary what evap temps can you have on the same loop? Can you have a coil at -20? and another at 20f?

With CO2 loops would you use flow controls like on a glycol loop to control your temps? or use a solenoid?

What pressure do you keep the CO2 at? What is the subcooling coming out of the exchanger and coming back from your evap coils?

How does CO2 pumps stand up? problems with cavitation such as in a glycol loop? or am I wrong in "assuming" its a centrifugal type pump?

Im full of questions thats just me. I will wait to ask some more but trust me, I have more