Ok, so update on the arrow shaft project.
It was a busy weekend and I didn't get nearly as much done as I should have. Mainly because I had to put a new master cylinder in the wife's Toyota. What should have been a two hour project voraciously consumed most of Saturday. I really don't like working on cars anymore.
Anyway, arrows. I keep any poplar that has excessive grain runout or other minor defects and use it to make laminated shafts. I cut it into slats and discard any with major defects such as pin knots. I grind each poplar slat to about .140" and grind a center strip of maple ground to .125". These make good, durable, consistent arrows. I can control the spine by altering the thickness of the maple core and also by the finished diameter of the shaft.
Here are a few pics of the process.
This is the three pieces which comprise the laminated billet. Poplar-maple-poplar. I try to orient each one in such a way that the grain is reversed like so: ///||\\\