I've got an extremely large pin oak in the back yard that's dying. I'd say it's in the neighborhood of 7' across at the base. More than I'm going to be able to reach with a 36" bar for certain. Not sure how much bigger I can go with the 064 and I really don't like the idea of buying another bigger saw AND bar just to deal with one tree (even though it will end up being more than a day's worth of work). Thoughts or suggestions? I do plan on the tree coming down in the dead of winter if that makes a difference.