My favorite bow wood. Osage is more stable and reliable especially at higher weights, but my fastest bows per draw weight have been black locust.
If I had one chance to make one bow from one stave, I'd choose Osage because I'm not a dummy.
If I had a choice of five staves of the same wood to make bows from, I'd go with BL to get the fastest bow possible.
The stuff takes heat and steam very well, and a toasted belly is a big help due to the high tension to compression strength ratio. I also trap some of my BL bows, but I kinda like the look of a clean BL back enough that I hold off until I'm sure I need it.
My best have been 65-70" TtT, 1
3/4" at the fades narrowing to pencil thin steam-recurved tips (seriously, I make them as thin as possible and always like them to do a little work) with BL overlay nocks. I would have to call most of them character bows as I haven't had many staves 'boring' enough to make completely character-less
I have no idea how to use a BL board. I'd take a swing at using a bamboo back and slightly wider design. Despite the tendency to chrysal, BL actually has a very high compression strength; I think the issue is actually that the tension strength is significantly higher than the compression strength, which when compared to Osage's com/ten strength and higher jenka hardness is less stable.
I've made bows that I still shoot with two-month wood. I cut the wood four inches longer than what I'm going for and don't bother sealing after immediately splitting. My stuff has all been very easy to split, but apparently that's not always the story. I take the sapwood off as soon as possible and just leave it in the garage for two months, and keep it near the wood stove while working on it. If the wood is slightly green when the bow is finished you can expect it to gain a few pounds of draw weight, so don't make your perfect bow from green wood