As a plus, as long as the bow is longer (70" +) it seems to take ring violation ok. As long as it is kept to a minimum I have made hackberrys with violated backs and never had a failure. I make a 90# @ 26" (read: unshootable) hackberry flatbow/holmegard bow that was around 73" long and only like 1/2" set. Had a violated back too, not super bad but some pretty big spots here and there still. Also had cut threw the back nocks. Which the string did not cut or indent into the wood like on other woods. I was keeping it as a workout bow pretty much, but just got tired of it and removed enough wood trying to lower the weight to where it had ridiculous set, so it ended up in the crap pile outside. I think I should of kept it just cause. String tension was insane.