My first thought would be to go with Don's lag bolt idea for the bottom and look for a way to install a trap at the top. For those that have a factory installed residential what method did Keystone use???
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Darwin & Maureen DeBackere
Minnedosa, Manitoba, Canada
2011/3500/Silverado/4x4/DRW/Duramax
2017/3721RL/Legacy Pkg./Pressure-Pro
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