I know a on a tall, rotten, backleaning hemlock we did in the Parks, we used a thicker hinge because of the heartrot. Almost too thick, as the tree started to split/ barberchair rather than just tip. I was hesitant to get back in there and cut more because of communication difficulties over 200+' through the brush and the noise of the truck powering the hydraulic winch. When he was already pulling the tree over, I doubt he would have like to gotten a radio call to have a discussion while the rotten thing was leaning over a CCC kitchen shelter. A good thickness of hinge with a steady pull, whether fast or slow.