Something interesting I saw demo'd at our Safety Days. 50hp machine, 32 carbide blades, remote controlled by operator, track driven and can operate up to 55 degree incline. If it didn't cost $112,000 I'd love to have one, bees were stinging it and not the operator. Our utility contracts brush clearing for right of ways and this thing's a beast! Forgot, does trees up to 6 inches in diameter.