ORIGINAL: hugger-4641
The expo button is to activate accessories like the combat module, drop module, or nite module. There is a port on the rx for plugging the accessory in. The stock radio really is a P.O.S., upgrade it as soon as you can. The rx out of your extra easy or another plane will work just fine in it.
Thanks, didn't even think about taking the receiver out of the extra easy! but I do need to get and better radio