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Does compression straightening affect spine?

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WhistlingBadger:
Subject line says it, pretty much.  My chosen method of straightening a stubborn shaft is to roll it on a table until the high part of the warp is on top, then rub it a few times with a bottle, mason jar, or smooth stone.  This takes bends out of POC like a dream, and it works pretty well on sitka too.  My understanding is that it compresses the top, longer fibers (a lot like what a sinew backing does on a bow), pulling the shaft into alignment.

Since I'm all into tuning at the moment, I'm wondering if this technique affects the spine at all.  My guess (and hope) is no, since you still have the same amount of fiber.  Anybody with a spine tester ever done a before-and-after?  If so I'd be interested.
Thomas

p.s.  I'm really going to have to just suck it up and buy or make a spine tester, at some point...

DC:
They are really easy to make. Get to it. I made mine from junk around the shop. But I do have a lot of junk ;D ;D Start with this http://bambooarrow.com/dialface.gif

Pat B:
It may affect the spine on the compressed side but depending on the orientation of the compression side it may not matter. If possible you want the stiff side of the arrow against the bow and secondarily against the shelf or at least the under side.

WhistlingBadger:
Makes sense, thanks.  DC, yep, yep, yep.  I need yet another project for this winter to keep me busy until I get my deer hide back, whack a coyote or two, and can start sewing a new quiver...  (lol)

Woodely:
That's the problem with organic material,  the stiffness is never the same 360dg. and varies from shaft to shaft.   Even if you are the best Archer arrows with variance can affect the grouping. 

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