The Fecon or any fixed tooth unit requires lots of hydraulic horsepower and lots of cooling. You are asking a lot out of a small package. All those brush units take a real beating working down in the dirt so expect to replace belts, bearings, teeth etc. on a regular basis. I know one guy who bought his brush mulcher based largely on tooth replacement cost. You need to email Jason at Yellow Dog Services and Richard at tex-clear lotscaping-do a Yahoo search. Also, check out FAE USA. Jason runs Hi-flow Bobcats with a Brushtamer head, Richard has an ASV RC100 withan FAE head. These guys run them all day, everyday and really know their stuff. Good luck!