Our sanding machine does one shaft about every one or two seconds, so at the end of an hour we could have 2 or 3 thousand in a cart, and stacked on top of each other thy don't cool very fast. As for the question does spine stiffen the shaft at 10 degrees. I have never tested that but it may to some degree. Self bow shooters like to "warm" their bows up before shooting and they are all wood. I also feel that sealer and finish that you put on your arrows will help to control the wood, it certainly keeps moisture out. However I believe that the difference between a cold arrow and a warm wood arrow may only be a pound or two in spine, and that may be a difference in some shooter but not in mine. I blame most of my bad shots on my release.