Having a continuing problem with drivers ripping jacklegs off your beavertails? This could be you an answer. A simple proximity sensor that slots into a pre-drilled hole in the Sterling Jackleg Frame. When this is wired up it emits a loud audible warning in the cab, if the driver tries to release the handbrake when the jacklegs are not properly stowed.
Wiring instructions for most manufacturers can be sent to you on request.