So I ordered the transmit/receive modules and couple of amplifiers along with some other things I needed. We'll see what happens.
I thought about a tether awhile back but I didn't want the extra tether because I was thinking I could run them as just the A, an AB or AA. Reality is they have been and ABA since I got 10 years ago. Would the PS2 audio amp support 3 speakers?
Latency could be an issue for sounds other than the prime movers. I don't use most of the sounds but I can see, or hear, that 3 horns or 3 bells sounding in each unit would not be very prototypical, even more so if they were out of phase.
The description and instructions for the send/receive modules is pretty thin. We will find out when we get them just how flexible, or inflexible, they are. I always loved products that came with instructions that said: "Congratulations, you buy nice product".
Keep in mind that I am not an electronics guy - ask me about a watch instead, but I'll let you know what happens.