That could work, Beau.
To eliminate rocking, I drilled and tapped a hole in the bottom of the receiver to take a 1/4-20 bolt. The bolt tightens against the tongue of the carrier/boat tail and holds it nice and tight. IMO it's adequate, and eliminates a lot of extra fabricating.
The coroplast material introduces some flexing in the structure of the boat tail itself, so I've re-convinced myself to triangulate some angle aluminum reinforcements on the front bulkhead to anchor some ratchet straps.
If I weren't such a perfectionist...
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-Terry
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