Finally used the PHD and what a tool. I dug 19 holes in apx. 90 mins. Granted I had some help from the neighbors. The testosterone was at very high levels in my yard today. I think they were as excited as I was. The 12" auger didn't phase the old bx-22 at all. I probably broke 4 shear bolts total, and three were more my fault than anything. (Too much too fast). All in all the tractor supply/speeco PHD gets an "A".