How to make a true hollow spiral
http://my4spiral.com/
For years man has been trying to make spirals, grooves around a piece of wood is not a spiral, they are only thread's, to make a hollow spiral one needs to, first make a true spiral,then hollow it out. If you study the video you will see that the spirals are true spiral,and they are hollow.
Daniel Morton
Wednesday, February 17, 2010
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