Looks like you are the expert! At least you have heard of it. First time I have heard of it. I'm as curious as you are. It is interesting that if centered and same time as normal 4pt you can not stop rolling. Do it with a stick plane looks neat. I will try it next time out. But it seems for a left ratchet 4 pt you have to start with a ratchet 1/8 right then to the 6, ratchet 1/8 right then to the 9 ect