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How to re-visit on spine testers

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Lombard:
Found this Spine Tester thread in the how to's and build alongs. http://www.primitivearcher.com/smf/index.php/topic,4589.0.html  I made the pointer as describes in the last PA issue, that highlighted a build for a spine tester. I liked this spine tester, because it is scalable to different arrow lengths. All I need now is to make the two pound weight, do some sanding, and put a finish on it.

This should make grouping the arrows I build easier, as what I had before is just a couple pegs in my tillering station, a one pound dumbbell, and a pencil mark etched in the plywood, to give instructions on arrows that match my go to bow.

This is as easy a build as one can do. The longest step for me was getting my printer to work, to print the scale. I am not so computer savvy as I would like to be. ???

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aero86:
good job!  will make consistent groups of arrows for ya!

Pat B:
Nice tester. Should be easy to read.
  The standard for a spine tester is to have the uprights at 26" apart and it is for testing a 28" arrow. For any arrows over 28" subtract 5# of spine weight per inch and add 5# of spine weight per inch for any arrow less than 28".  A different spread between the uprights will give you inaccurate readings.

Lombard:
Thanks guys. Pat that clears up something for me. I was trying not to get hung up on the ratios, but realized that a two pound weight on a shaft twenty six inches would reflect a different ratio than the same weight on a thirty two inch shaft. The movable pegs will easily allow me to pin them at 26 inches, and that is easy math. Should have nicely grouped arrows in no time.

natty:
i know this sounds stupid, but were does the weight go, also how does it attach .

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