RE: 10X Question
A) Yes, if it is the aircraft system, no if it is the heli system if it is to be used as the master system.
B) The buddy box can be any JR system, such as the trainer set, part number JRPA400.
C) If using the 10X aircraft system you will use the pilot link function. Activate the pilot link function, and the snap roll switch on the 10X will be the trainer switch. If using the heli 10X, it can only be used as the slave system as it doesn't have a trainer function.