I am fed up with having to back drag then push then back drag again, each driveway. I had Fisher back drag edges on before but they were a little taller then the cutting edge by almost an inch but that was after I found out my brand new plow wore down the edge almost an inch in 6 hrs or so. I havent tried them with a brand new edge yet. Do they line up the same? or is there still a difference between the two edges and how well do they work?