It has been suggested that edge grain (quarter sawed), as in boards OR starves these aren't great for self bows. Osage is risky for breaks, and in general the wood's dynamics aren't great even if it holds together. I have verified this with a couple silk backed specimens. I'm not sure about BL, but note I've never seen an edge grained BL selfbow and plan to stay clear of the concept.
What about with hard backing though? I did a boo backed edgegrained BL board a couple years ago, and it might be a touch more sluggish than plane swan.
What's the concensus?
Dave