With futaba radios, the slave radio should have no crystal and no battery. When the slave is hooked up to the back of the master TX it would recieve its power from that. If i remember rightly the conquest didn't have a Snap-roll switch so there shouldn't be any programing on the master TX. Course you should trim the slave radio and make sure settings are where they are supposed to be before you bring it up. So when the trainer switch on the master is engaged the slave TX wont have an adverse effect on the plane.