I got sidetracked, but I got a dozen shafts out of that block, there was relatively little waste because it split so well. These stay remarkably straight compared to some other materials I've tried. I think this is because they follow the grain well.
11 are about 3/8", the last came out at 5/16". 5 of the large ones are between 430 and 460 grains, 6 are between 400 and 430 grains. Good enough at close range, but I'll be making more so I can get a really well matched set. Let me know if there are any other angles you'd like to see.