If I buy a Hitec Laser 6 with a flight pack and the frequency for the radio and reciever is 53, can I buy additional Hitec flight packs at the same time with the additional receivers also set to frequency 53? Will I be able to use the Laser 6 with these additional receivers since they are both on frequency 53?

If my receiver goes out will I have to throw the radio away and buy a new one?