Still a bunch to figure out. tank system, gauge of tubing, braided tubing or stainless hardline, delay circuitry to the pump so the coil can heat first, deck layout, etc...
I have been thinking this through for a few months, but don't have the capital to get the parts I need and a metal 3d printer, or CNC machine to build the beta. I have access to a 3d printer that can produce in PEEK though.
Will the dna 40 step up the 3.7v from the battery to get the 12v pump's rpm high enough?