I just installed a Safe-T-Plus on our 40 foot DP. Seems to work well but haven't used it enough in windy conditions to see if it helps with driver fatigue. That's why I bought it.
Question. When driving the motorhome the Safe-T-Plus works fine with plenty of clearance. Driving with air in the tanks, it sits below the fuel tank with enough clearance. When parked and leveled (air out of bags), the back of the cylinder rubs ever so slightly on the front of the fuel tank. . I don't think this will be a problem as it is slight but can't find any adjustment in the installation to give more clearance. I did buy the right kit to fit our freightliner so please don't suggest another kit.