The master is alway trasmitting to the model. control is pasted to the slave unit. also on a flying wing. both radios need to be computer radios since the slave doen't use the mixes on the master it has to have its own mix. leave the power switch off on the slave unit. With JR you acually need to set witch unit is slave and master though the program since the unit just turns on once the cord is plugged in. Personally I've alway rather used futaba/hitec for trainer systems since they'er more dummy proof.