Grey, in addition to what you do, I also put the straightest grain on the nock end of the arrow. If there's any tendency toward grain run out or bend in the shaft, I put that end toward the point. Much easier to straighten there. Otherwise, one ends up mashing feathers straightening the arrow if the arrow has a bend toward the nock end. Straighter grain there is also less likely to break than grain that runs out or near the edge.
To my recollection, I've never had a shaft break because of bad grain, shaft too light for the bow, etc., but I hand select all my shafts and have been doing so for more than 30 years so there is virtually no grain run out on my shafts/arrows.
Until Compton's this summer, I could say that I've never had a wooden shaft break on the bow, but I broke one there. Pretty sure I shot a cracked arrow, one I glanced off a target two or three shots earlier and forgot to check before putting it back in my quiver. Noticed that it was quite bowed in my peripheral vision, but shot it anyway. Bad decision. Don't know where the front half of that arrow ended up. The back half landed about 5 yards to my right and front. One piece or the other gave me a good welt, which turned into a sizable black and blue spot, on the inside of my bow arm bicep.