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Why not both? I suspect there's opportunity to finesse the details, as with vortex generators.
In other news, I added a wickerbill to the corner of my Airstream and now the prevailing NW wind that used to blow the door open blows it shut. Aerodynamics works!
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
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