Na, its a brand new design. I call it a Carosel trimmer, and it consists of a main body with several arms that extend out and rotate around the center. it attaches to a tractors PTO or hydralic system n 3 point . on the end of each arm is a cutterhead, basically a beefed up weedwacker (think DR x 5 or 6, perhaps metal strings also). my original application was for the weeds beetween guardrails on interstates and such, but I found it can be used anywhere, ive even got drawings for a twelve foot offset, fully adjustable pitch and such, on the fly too, but imagine a 3 or four pointed star sorta thing being pulled by a tractor. on each point of the star (arm) is a cutterhed, and each arm, like the animals in a circus carosel, rotate around the center, and the forward motion of the tractor causes the arms to rotate around the center whenever a object is struck (guardrail, fencepost, rocks, trees). You have to use some imagination until i get a drawing up. this machine should be able to generate enough power to be a specialist brush clearing machine, destined to be in every county garage in the country. ODOT and WVDOT all put down a huge amount of extra shoulder asphalt around guardrails now to prevent weeds and deter deer from crossing roads (huge problem in ohio). Ill try to post a Pic mon or tues.