I'm struggling to get a two of my three-way switches to work right. They work fine with a normal common switch.
With the RRD-6ND on the active and RD-RD on the other side: I can turn on and off my lights with the RRD-6ND, but only turn on the light with the RD-RD. Light won't go off via the RD-RD. I swapped switch locations and the lights don't turn on and off at all.
Here's some photos that might be helpful:
-Keith