DSX player struggling with metal rhythm playing

Hey guys! This is my first TC submission, and I’m stoked to be here. Since discovering Cracking the Code I’ve learned that I’m a DSX player, and I think I’m kind of in the “David Grier” camp (dsx motion, pronated wrist). This has unlocked some cool licks, and a big improvement in overall speed. However, I still really struggle with single string palm muted rhythm playing (example: Metallica). I think I favor using my wrist joint near my thumb-side, but I feel like I need to develop the ability to use the joint near my pinky side if I want to achieve the proper palm mute effect. It feels very difficult to rotate my hand in a supinated fashion without sacrificing speed and fluid motion. I seem to be able to palm mute using a string hopping technique, but it comes with a serious lack of speed. My question: is it possible for me to learn USX playing for situational Hetfield-esque metal rhythm playing? Or is it possible to achieve the same effect via DSX motion?