Nice, I did it on the pop ups useless 3 way 1.9 CF Refrigerator. Never again, if the trailer doesn't come with a refrigerator that actually works, I don't want it.
Your mod looks nice but if it was sold to you not working in all situations, I would had stuck it to the dealer to make it work. I should had done that myself as the refrigerator COULD NEVER cool right as the space requirements above the refrigerator weren't made. I see you camper was made with the same incorrect design flaw. That being with the lack of space above the refrigerator that allows natural convection.
I wouldn't have a refrigerator in a Pop Up again. Marketing and crap. Had to much food go bad because it couldn't cool correctly because it wasn't installed in a space big enough for it's requirements.
Hope yours works well, good luck.