The V-rake has an elongated tow beam with a front end adapted to be connected to a towing vehicle and a back end fixed to a back section, the back section is supported by a wheel assembly, which may be a set of tandem wheels. The harness is then secured with respect to the vehicle by a mounting arrangement that is independent of any seat shell. Such an oral appliance may be a custom-made device which can enhance andor optimize received data andor audio signals for vibrational conduction to the user.