First one, I would like to know if those pull behind mowers , that have their own motor has the power to mow tall grass that has not been grazed this year. I'm talking slew grass, switchgrass little bluestem, and maybe willows about 3 feet tall. I would like to know if you're pulling a high gear #9 behind a side by side what speed is ideal. I build fence for living and am trying to find a way to knock down the tall grass before I start on a stretch of fence.