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I own a 6' RoadMaster blade (the double angle blades). I more commonly refer to it as, the miracle blade. I had a hands on experience with the road master at a dealers lot. After operating the blade for 30 minutes or so, I was very impressed. However I opted to purchase a new Gannon 6', 6-way, with Hyd. rippers. the price of the roadmaster was to much (I thought) 350.00 a foot. 10 months later I purchased the 6' Road Master. This blade out performs the Gannon hands down, in grading and leveling. If you intend to do a lot of contour work then the Gannon is the best application. As far as Horse Power Rating goes. I pull mine with one of two tractors, a 75 H.P. (with no problems) or a 60 H.P. (with wheel weights) with only minor wheel spin under full blade load and, it does put a load on the 60 Horse. The Roadmaster lacks in, the ability to move material (mound) as quickly as the Gannon does. My suggestion to you would be, If you have a lot of grading to do the double angel blade style box is the best answer. The front blade cutts the surface, the second blade shakes out the fines and the rocks travel over the top of the second blade. giving the finished surface, a new road look. Their performance is amazing /w3tcompact/icons/smile.gif