i have a 4720 and i want to run my old bush hog model 307 7ft rotary cutter. its currently a 3pt hitch, however i can swap out the rear height adjustment arm with a piston and run it semi mount. so i want to know if this would be tough on the tractor turning that beast. i don't plan on mowing anything heavy with it, about 1.5 ft of grassy fields and some golden rod in the fall. TIA