Hey @clinttustin, welcome to the forum!
Actually the recommended approach is to milk your primary motion for as much as you can. Most licks that aren’t playable with a particular motion can either be rearranged (i.e. re-fingered with the fretting hand); started on an upstroke instead of a downstroke (or vice versa); include some strategically placed legato; or swiped.
This is what the majority of the great players we admire are actually doing. Eric Johnson can’t play DSX licks and conversely, Al Di Meola can’t play USX licks. No one faults either of them for this
That said, if you’re dead set on a USX motion, try one of the table tapping tests that work with USX. Forearm (rotational) motion has USX capabilities
Another thing you could do is describe some of the riffs/licks you want to play that don’t jive with DSX and other forum members could help you brainstorm how to rearrange them so that they are playable with the motion you’re already good at.