Nitrous pics

My slant six fuel system. Two inline electric pumps side by side (each one can handle the system in case of a pump failure). They are approx 50 g/h at 50 psi. Feed a return flow regulator set for 15 psi, which in turn feeds two "holley" style regulators (one set for 5 psi for the carb, and the other adjustable from 6 psi for the nitrous).
Control is fuel pump switch on, arming switch on, full throttle switch on.
I do have a purge system, but usually don't use it, as I have not seen any difference in my runs, between purge and no purge.