Yes this can be done and has been done. The theory is that the Flow Rate of the Max-flows at lower pressures is good. It's always good to run a second reg just in case you get spikes in the pressure. The Gladiator is an example of a high flow reg. But I have seen Bushy runned all the time with Max-Flos and Conquests with a Gas Thru Grip because they preform so well when broken in.