These are by far the greatest mods that I have done to my plow. I just welded a piece of oil drill pipe on to my cutting edge and figured I would cut it off when the gravel got froze. It works so well then I never took it off. No snow here yet but I'm prepared.
I get about 2yrs out of the pvc, but I will probably go with steel when this pipe wears out. They are calling for 12-18" by Wed afternoon so I'm as ready as I'm going to be. Think spring.......Ha