Pump it down TRW pump?

Would this work on a Borgeson Saginaw pump? I'd love to dial down the pressue on mine. I have their "power reducing kit" that uses washers, and I've reduced the pressure down to around 900lbs, but it seems like this option might be better for fine tuning. I love the Boregson unit but even at 900lbs, it's still a bit too much power for my Duster.