I have also seen, many times, where people that are experiencing the same issue have drilled another set of holes in the rails. Four holes are required (one set of holes in each rail). You can experiment first to find the height that you want....1'...1 1/2', whatever, then run the bed down to that point and carefully drill new holes just large enough for the pins to fit into. John's advice about removing the thin "mattress" for this trip will get you some air movement, but the method I mentioned above will make it work every time you are in that situation.
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2016 F350 King Ranch Crew Cab Dually Diesel 4x4
2018 Grand Design Momentum 394M
2023 Suzuki GSX-S1000GT+
Excessive payload capacity is a wonderful thing
"If it ain't Fast....It ain't Fun"
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