Tracked Baja

Well, after seeing the pics of the Tracked Baja 5t from RCX, i started thinking, would it be hard to make my Baja use tracks, does it have to be as complex is that 5t to be functional? It seems to me that you could just mount up some independant brakes on the front and rear hubs.. Am i wrong in this assumption? I guess maybe a Bajas diff is too heavy duty to function in this way. I may try this if others beleive that it would work, adn as long as it didnt require a great deal of custom fab.