It seems the Epoch compact lacks the depressurise knob and uses the industry STD bottle, so does anyone know what's changed? Have Skout changed the type of O rings used in the gun as I was under the impression that poly O rings were not long-lived under pressure and would take set and stay distorted, and so if this is the case can the Epoch and the Evo be converted so we don't need to turn them off when not in use for a couple of weeks, or keep replacing the bottle O ring.