Just my own feeling, but I would avoid pop rivets.
Lots of people have had leaks when they're put under stress (e.g. the factory awning mounts). If not the mere VHB tape, I would still prefer to go all the way through and "sandwich" both of the sheet metal layers.
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TM='06 2619 w/5K axle, 15" Maxxis "E" tires. Plumbing protector. 630 watts solar. 450AH LiFePO4 batteries, 3500 watt inverter. CR-1110 E-F/S fridge (compressor).
TV = 2007 4runner sport, with a 36 volt "power boost".
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