First, to all who were commenting about drivers that shouldn't be flying down hills at 10 mph and how dumb it is in the first place, Ted was only driving on that hill at some of those speeds and angles to show example of this product. Someone had mentioned (on pg. 1) that it does nothing for the rear, as far as braking. Well, with a Z, this is all controlled by the sticks (drive power), so there is no need for rear braking. as far as the independent front braking, this would be not only unnecessary, but useless, since the sidehill control is controlled fully by the ability and agility of the rear wheels to hold their ground. I can sure see where these things would certainly improve the ability to control a machine while coming down any hill or slope, and I'm sure that probably 80% of us experienced riders have been in a situation where we have felt that "anxiety" as the mower started "free falling" and slipping coming down a hill. I love the idea, and the whole concept, and wish ted all the best with it. I WOULD like to see a different routing going to a shorter (height) elbow at the top of the swivel. Also, please inform us on how this is done though the center, as the caster spindle is solid.