I stumbled onto a neat trick with my John Deere rear blade while blading snow last week that I thought I'd share. I had just pulled the pin to point the blade backwards and didn't notice that I put the pin in the wrong set of holes in the main beam. When I went to back up and sidecast the snow windrow, I found the blade was free to pivot either 10 deg to the left or to the right, depending on which edge of the blade loaded up with snow first. this is real handy for widening the lane on the drive because it gives me sidecast left or right without getting off the tractor. Hope this description makes sense.