i double checked myself with a FSM before i gave a reply. the events in the service manual don't give a complete timing event. the closing ramps are so long that the last 5-10 degrees of duration occur within a few thousandths of an inch. i know when i tried to map out a stock magnum cam i was confused until i just kept playing with it. i got into the same situation trying to map out an engle solid i use that has long closing ramps. i understand it better now.