No thinking your job plan and seeing it through is tantamount to preventing most accidents. If you are loading logs on a low bed never approaching head height, then over head injuries are way lower. If you are loading a logging truck, another whole scenario. If you are running over logs.. you are not planning well. Your road should be clear. If you are pulling a tree with it and you are not 2X the tree height away, you are not planning your job proper. YES accidents happen. Thinking your job through and initiating the plan is not what leads to natural selection (this includes PPE) but quite the opposite Willard. And as Carl pointed out.. A cage can be had. For residential tree work, with proper planning and execution of that plan, I doubt it would be entirely necessary. Safer, possibly, but not entirely necessary to do one's job safely.
Like putting a farm tractor to work in the bush skidding wood. The 540 looks like a real nice machine with good potential for serious tree work, but definitely some reinforcing and some forestry grade modifications needed to get it up to a production machine not being in the shop every other day.
