I have felled a lot of trees, but once in a while I come across an interesting or difficult one for which advice would ensure my safety. I have a double trunk shagbark hickory with one standing dead side that I want to fell for firewood. How would I cut the dead side down? Should I create a notch, and then stair-step it, creating two hinges, with two plunge cuts leaving a 1" overlap? Should I relieve the stress between them with a vertical cut first? How high off the ground should I cut it? I'm 5'6", which is huge in Japan. Saws to recommend are JohnnyRed 920 28", Husky 371XP 20", or Dolmar 5105 18". Thanks.