I have had my 2009 male now for 5 1/2 months never seen any signs out of him, I have flipped him he turns himself fine but I do not know he could have had it when he was younger. I am gonna attempt to breed him this season if I have any spider babies I will give them all a chance.. I am not going against snake lab I am glad he is trying to fix the wobble. for those who say ALL Spiders have it I must say from my experience ( not to much but a bit) I would say that is false. Even when he was under the stress of a new home he never showed signs.