Damn, I was coming back to look at this post. I was thinking that the photos were before the WD hitch. Did you ever figure out a way to get level? I have a Winnebago 2100BH and it's very similar spec to yours. Dual axle, 3700 lbs with 430 tongue.
I'm trying to figure this out right now. Put the harness kit on as it did not come stock. Now I have a camper with brakes, need to get it connected. Anything new on this?
Wait, does the Mopar lift already come on the 2020 Rubi, or does it actually take it higher? Very interesting if higher than stock height. I may be up for that.