Can a 4-wire system consisting of multiple System Sensor 4WTA-B smokes (all daisy chained on the same zone) be "expanded" by adding Elk 2-way wireless smokes (ELK-6052)? I'm thinking rules will need to be set up to cause all smokes (wired and wireless) to sound when one smoke trips, similar to when 4-wire smokes are on more than one zone. Also, maybe rules will be needed for resetting them? Can they be made to all sound in tandem? Any downsides to mixing wired and wireless smokes?