All this science is way over my head. But it did make me feel that I should be doing something. The head showed a few small cracks at the exhaust flange side and Zenon took it to work to weld it and machine it flat again. That was about 5 weeks ago. meanwhile I got a new lens in my right eye. needed to renew my driving license. Should be a piece of cake. Going on 4 weeks and the eye still hasn't healed. But anyway Here is what I did to pass the time and make it look like I had a plan.