has any one had this happen to them? one of the cooling rings in the center of the cooling head broke off. whats strange about it is it broke off perfectly round. all around the head in one exact piece. I will post a pic later. it broke away from the cylinder head completely around and is still sitting there. there are no nic's on the outside of the cooling fin where I thought some thing hit it causing it to break. by the way it is a go tec 5 port