If the manufacturer says it's O.K., and you don't have any stability issues with the way they are, I wouldn't lose any sleep over it.
In addition, if you think a trapezoid shape (wide at the bottom, narrow at the top) adds stability or strength to the jacks, why wouldn't you get the same strength from the trapezoid being upside down? The RV is still fully supported and stable, isn't it?
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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