Thanks for the tip using a string to check valve clearance, I will check it tomorrow. I am very happy with the 184BH. I am a retired Aerospace design engineer and get caught up with details often. I just thought it would have been common sence to keep loose sensor wires protected from the elements. I don't expect the manufacturer to dress the wires as we would on a fighter jet, just keep em out of harms way from road debris. I have to use two, 2 x 10 pieces of lumber when I get to the end of my driveway to reduce the dip, otherwise I would rip the plumbing off the black water tank!