Heh heh, easy, the rinnegan took a chuunins life time away, thats what jiraiya said, he sucked the time out of him until he died, nagato most likely used his rinnegan on past foes jiraiya fought and used this great eye technique to give them more "time" and simply control them with these piercings.Hmmm it does have good points but well he there chakra recievers are really coming from Nagato, Than he also must be using there own chakra because I highly doubt that Nagato has enough chakra to fuel the six bodies and there jutsus. It would also prove how they can "see" through each others eyes, but here's my question:
If they are puppets than were did he get the bodies from?
For instance, the Pein that Jiraiya "Killed" was a man Jiraiya fought while he was younger in fact they all were, I understand how Yuhiko's body is there but how did the others get there? I also read how if the recievers are dislodged how they will "De-Activate" yet when that man was killed the reciever's were still working outside of his body, besides how can a puppet die(they must have been completely destroyed, to stop working)?
As to the demodulation device that was removed, there is probably a distance in which the rods and piercings have to be near each other to recieve the wavelengths, if you destroy them though i reckon itl do something LOL.