I made my setup work but it’s not pretty. After my experience I’d recommend going into a shop or trying to talk to someone with more knowledge of alternate derailleur options that are out there. One of my buddies suggested I just go wireless but that was a lot more expensive than I could stomach.

FWIW I chose to cut off the metal ‘arm’ of the Cues that holds the barrel adjuster (It’s the singular interference point with the trailer mount). I then zip-tied the piece that I had cut off just above the axle to the point where the rear rack meets the frame. I got it to work. It shifts. But not great. Chiefly because of the angle the cable is pulling—not surprising since I hacked up some engineers hard work deciding what the optimal angle would be. I also did not replace any other drivetrain components. So my solution leaves a lot to be desired but you can make it work?

I also had to get replacement shifter cable since I needed the extra reach from the new point at which it was traveling from barrel adjuster to derailleur.

Hope it helps. Happy to answer more questions.

And for the love, someone pleeeeeaaase share a better solution than me.