(1) on the 4-6 inch off problem jd tec thinks it is a planting offset to the left meeting against my cult. offset to the right.  I have to go over my problem field again to ridge the beans. I am going to start on one side, snap a new ab line, work my way across the field and see if I ever get a 4-6 inch problem. 
(2) Why I lost all my ab line he has no idea. He say there may be a bug on my 2600 circuit board or my card. He is coming out to redo the circuit board and put in a new card.
Well, it is a plan.