I used the hair dryer method on a old Bear Kodiak Mag one time.Heat it up till it`s real warm at the twist area.Not so hot that you can`t touch it though.Twist it back a little past center and hold till it cools.Then slowly let it back.May have to repeat it a couple of times till it lines up straight.I had to do it two times for my bow.Shot 100`s of arrows out of it after the repair and it stayed put.But that line looks like a crack to me.If you want,you could mark each end of the crack and shoot it.If the crack grows,do what 30coupe said,take it to the bow doctor.