Some of the Amish in my area are using these. I looked at them a couple of years ago, they are pricey. I asked an Amish equipment dealer and serviceman about them. He said they are better, but for my money, I’d be better off with the haybine guards.
I use the same setup that plowboy is talking about with the 3 stub guards and the rest haybine guards. Works well for me.
Lane