Has anyone ever made a homemade version? What speed is that rotating, how much torque or flow rate does something like that mulching head have? How much would an attactment like that cost?
One of the videos mentions that the grinder head (or whatever it is called) has dual speeds. Low speed/high torque for grinding stumps and larger pieces and high speed for small brush and mulching. It would take a lot of HP and GPM flow to run one like in the videos. I would imagine it is not cheap considering the use/abuse it was designed to withstand.