Please advise if this is workable in a 4 way circuit. Sub in one PD5ANS in place of one of the 3 way mechanical switches and leave the other mechanical 3 way and 4 way switches in place? The sub would be on the load side 3 way connecting to RED on the PD5ANS, the travelers connect to Black & Blue and of course White to N in the same box. I searched the forum and did not find this question posed elsewhere. Thanks