Buy yourself some 8' rails, swap them for the 12'ers, cut the table and you have exactly what you need. I might be interested in the 12' rails myself.
That seems like the cheapest, easiest solution to your space issue. I wouldn't cut the rails, just replace.
Words of Wisdom:
“Words that sink into your ears are whispered…… not yelled”
“The biggest trouble maker you’ll probably ever have to deal with, watches you from the mirror every morn’n”
“The only difference between a rut and a grave is the depth”
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Just remember...when it's time for the hearse to pull up..there's no luggage rack on top!
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The beauty of the Second Amendment is that it will not be needed until they try to take it...Thomas Jefferson