I have a simple requirement but can't make heads of tails of the Lutron website due to the vast number of options. I simply want an occupancy sensor which turns the lights on (with dimming) when someone goes up or down the stairs. I have switches and need sensing at both the top and bottom of the stairs. If I understand correctly I can install a MSCL-OP153M-WH but can not pair it with another sensor, only a mechanical switch? Yes? Any option to pair two dimmer/sensor switches on a 3-way? Thanks