I have been an instructor for over 20 years and before that I practiced thousands of confined areas,most of them at MGW. Definitively hovering at 5 or 6 inches of the ground you get more lift than at 5 0r 10 feet.Many times I approched and hovered at 100% torque with a 206 at 6 feet of the ground. Lowering the aircraft at 3 to 10 inches of the ground I would reduce the torque to 95%