That was an interesting topic, though have read it before and came away a bit frazzled from all the techno talk, just not my forte I guess. I have previously seen a you tube clip of a fella using a frequency meter to manually set the Explorer frequencies via the noise cancel function, and that just led to more confusion on what frequencies exist/are utilised. Mind you, the way he sets up his Explorer in this particular instance would end up driving me to distraction. :/
https://youtu.be/xcChyUlgPIs