The Man killer or (Whomper to most of us). Call John Deer. Ask them to order a 18' FLAT disk blade. It's 30 bucks. Have a welder make you one with a a 12" depth. Yes, it will leave it curved on the sides. If you order the 24" then you will pay 130 instead of 30. We found that a height of about mid chest works best. It leaves you enough leverage to pick it up and rock it back and forth once it's in the ground. There is a guy that sells them made but they are almost 200 and way to tall.