You def can crank up the venturi so that it blows by but most don't crank them up that high and even then, if you are careful you can get away with it. Without the DSV, I don't recommend doing so unless you just want to experiment, the reg can get unstable if you go too far. Properly set up a DH with a HPR can hold it's own with most any modern reg. My Argonaut was tested on the LDS's machine and it beat the pants off top of the line Scubapro and Atomic regs. A Poseidon was the only reg that beat it. The SP and Atomic did outperform the AK at very high flow rates, way above what any person could breath. If you shed the huge BC, I use a 15 lb wing or often none at all and get your weights right your air will improve a lot.