Have a big dead oak. About 80 ft tall, 2 foot dia. Insects are slowly eating it away. Leaning further every month as the base is clearly rotting. Waited for last two yrs for it to fall- it has a good 15 degree lean now. The canopy is full of large deadheads. Thinking of some sort of remote set up to get rid of this? Cable saw? Old chainsaw mounted on a fixture with an arm- pull one end of the arm with a rope and the chainsaw moves towards the tree. It's near a path but can't get a boom truck near it.