Reply by John Smith

I would think the same applies as to a floor mounted jointer:
prepare a 14 foot outfeed table with a 14 foot straight board clamped
parallel with the shaper fence so it will track true all the way out.
featherboards here and there would be a good idea also.

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jus my Dos Centavos

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-- I am a painter. That's what I do. I paint things --