the irangex 4 works fine for the flysky ia6 and ia6b on the qx7 taranis ...that is what i have, tested and flown for three years....the 4+ has usb for flashing the firmware ,which the 4 does not ...
Quite right....can do that if all else fails....things pretty tight in my foamie (flysky) so don't like fiddling around in there more than necessary.... so thought another RX was the way to go.