I got mine from LMC and it is the same as what you are stating bought not fitting well at the bottom outside corners.
I hoped after it was in the sun a while it would tighten up but it hasnt and now I have a puckerd gap at those 2 corners.
I plan to get a replacement from Steele.
Tim


1952 Chevy Shortbed

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If It Aint Broke Fix It Till It Is!