You should know where the aluminum studs are. I replaced the sheet metal mount for the 32" TV in our kitchen with a Harbor freight tilt and turn mount. None of its holes lined up with the in-wall supports, so I added an an eighth inch thick aluminum back plate that ht the supports and then mounted the TV arm on to that. You could probably do the same with half inch plywood as a back board.
In a pinch for an inverter back panel, I also mounted a three quarter inch piece of MDO to the wall inside the back of a cabinet. Lacking any info at the time of where there might be supports inside the wall, I smeared the back liberally with Gorilla Glue to laminate it to the wall, and used a dozen or so bugle head construction screws to hold it in place. That's been about 7000 miles so far with no discernible problems. Of course, the GG means that it's essentially not removable in the future.
I just did a little experiment and it seems like my venerable, aged, Zircon Stud Sensor might detect the studs OK. I tried my Walabot over the weekend with mixed results.
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2014 Sunstar 31KE
1988 Suncruiser 31 RQ
1968 Travco 210
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