We've got some rather brittle fibre gums here where I can't seem to get much benefit with a sizwheel. It'd have to be a tall, like 8 " or more siz/pocket in front of the hinge to have any chance the hinge would hold on rather than break. I was thinking the triple hinge might allow the weight to start shifting a bit earlier/easier and stop the hinge wood from breaking too early in the swing.
But it's just theory in my head which often has no grounding in reality by the time I'm actually there doing it.
It's clear from logger Wade's cutting vidjas that his din din afford him the luxury of dropping the trees exactly where they wanted to go, most of the time. He can clean 'em up and set them in better orientations for the skidders once they are on the ground.