this is how I would run an Ace30 or Ace40, and is how I ran the Ace15.
the pump I was using with the Ace15 was a nominal 8GPM (see: Cold ethanol pumps) methanol fuel pump. I really needed at least 3x that flow rate.
with “hemp” as input, I wasn’t seeing anything as pretty as @MagisterChemist is achieving, even at -40C, in the Ace15.
I was expecting great results at -20, but @MagisterChemist knocked it out of the park on this one!