The drive device of the invention comprises a ready to fit unit or kit, for installing in a detachable manner on one side of a chassis of a motor vehicle. A FIFO memory outputs, as one set of features, a total of 60 voltage values, which are broken down as 20 voltage values sampled every 12. An archwire slot extends mesiodistally across the body and between the gingival and occlusal tie wings at opposed mesial and distal sides of the body to accommodate an archwire.