@DavidDoria I've found that the 3 Way Dimmers don't work the same way (unfortunately). I did replace a 4 way circuit in my house with a 3 way Dimmer kit (the KS 230), but "killing" the 4 way switch....

@septer012 I was able to "smartify" my 5 way switch by simply replacing the "line" end of the circuit with a Kasa 3 way and that was it. The "other end" of the circuit didn't have a neutral wire in...