I have thought about trying to breed for, specially since I've seen it quite a few time in my lines but I don't know what it will mature to be like yet. We'll see .. .I think it just occurs in some birds, the best I could find official is "beak deformity" caused by injury, but I doubt that looking at the photos of theses birds compared to actually injured beak photos... I am thinking especially since people state it tends to occur in lines, or a flock of related birds it is genetic, but just not properly researched... So how to breed for it is the Q, because it is just too cool.
Kadjain have you considered breeding for this trait to see if it is genetic & what type of genes they may be?
I'll update pics as he matures