When binding a spektrum... it is really two steps... first you bind the receiver to the radio... then you proceed to set up the airplane and make the radio settings that are necessary for the plane...

After the radio work is complete and all the servos are plugged in, you need to determine the stick positions for SmartSafe Fail Safe... set the throttle position, and switches to their defaults and bind the radio and transmitter again. These settings will be use during a reboot after a brownout, or a loss of signal. See page 18 of the DX7 user manual.

Now you are ready to fly.

I have seen several Futaba guys fly with the wrong plane selected...(dangerous situation) Therefore, I like the model match feature of the Spektrum/JR system. Forget a bind plug? All it is, is a short piece of wire jumping the two out side conductors of the bind port... maybe not as readily available as a pin or tooth pick, but not hard to find something to work... I have so many receivers that I usually have a couple in each radio box.