RE: AR7000 won't bind
You set all the channels fail safe positions during binding. Only the throttle will go to fail safe in the event of a hold, all other channels will hold position with the AR7000 (the AR9000 from Spektrum and R921 from JR also have the option to have all channels go to fail safe). On power up before the receiver links with the transmitter, all the channels will go to the positions stored during binding.