I just got a new Stihl weed wacker pro model. 37 cc. Its a damn beast. I had over an acre of 4 foot weeds. I now have 3 weed wackewrs, a DR walk behind, a stihl bike handlebar pro and now this new one. Keeping weeds down is critical when there are rattlesnakes. This new stihl is the baddest ass weed wacker I ever used