Initially I thought something may be wrong since I was able to control either vehicle with one model selected on the 4PLS. In real life, correct, both vehicles won't run at the same time but just seemed not right coming from a Spektrum system where one model on the Tx controls one RC and nothing else. Nothing wrong with the Futaba way of doing it now that I know how it works. I guess maybe the end goal was to make the Futaba system a little more friendly to switching models is all since S-FHSS doesn't use unique Rx IDs. It looks like I may be able to get there using DasMikro or any other T-FHSS receivers though?