Looking for some guidance on a wiring up a Lutron pd-5ws-dv (3 way with mechanical switch).Here is what I have currently:3 way rocker switch: Copper to Green Screw, Red to Gold Screw, Black to Black Screw and White to Another Gold ScrewHow am I hooking up the Lutron pd-5ws-dv which has black, black, blue, green wires and what am I doing at the mechanical switch side? Is the white wire in my current mechanical switch a neutral wire?Thanks!