I've said this before in another thread, but I'd really like
@kelpiemsp to comment as he has some experience now with this device.
If all these various devices are based on the same mode of function, then they should be interchangeable. That is, if you split the wire on Neuromod's tongue stimulator into two and attached them onto the back of the neck, you would essentially have Susan Shores device. wouldn't you? And if you did vice versa to Shores device and attached a tongue stimulator, then you would have Neuromod's machine. They operate in the same way, but stimulate different nerve pathways. I don't see what's different between the two. Or is it more complicated than that?