Dealer called me and said my cylinder finally showed up. I'll be on the trail by the weekend! The only problem is they have not come up with a good reason for the scuffage. They sent the computer to Cat and had it returned but they weren't told what was done. I have no concret reason as to why it blew. My own theory is a combination of questionable fuel, not completly warm engine and 1 mile at the mid-range lean spot we have heard so much about was more than she could take!