Thread: Discussion Concave/convex planking.
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Old Nov 09, 2012, 07:12 AM
Al Offt is offline
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Boston, MA subburb
Joined Sep 2004
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Sorry you were not able to open the pictures. Attached are a few key ones although they may be hard to understand out of context with the rest of the article.

If you would PM me your email address, I'll be glad to send the whole article as an attachment (I can't attach a document to a PM).

Alan
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