If you have a subsoiler, I would use that first, to rip through roots. After making a trench then I would use the middle buster. If you don't have the subsoiler you might make one to fit in place of the middle buster plow point. The plow can bend. Some frames have shear bolts and some don't. If you have a powerful tractor you might bend the frame for the plow, if yours doesn't have the shear bolt. I built mine, and it is strong enough to stop the tractor in its tracks, so I don't worry about damage to the frame of the plow. Many years ago I worked for a John Deere dealer and we had a blacksmith shop. It had a forge and electric driven hammer. The blacksmith sharpened plow points for about everyone around there. I think you could sharpen the point.