Peter, the DA is a fine regulator but now that your hooked what you really need is a round label heavy yoke Royal Aqua Master equipped with seats and seals from the newest Conshelf parts. Amazingly, it is entirely possible to build up a Royal Aqua Master that not only breaths and works better than when it was new in the box but is highly reliable and durable and in fact breaths as good or better than just about anything you can buy new today and works just fine at 3,500 psi. Anyways, just want to help your relationship out! N