I have five planes but all on different freq.
What I want is my 9z tx for all.
Here is the question.
I understand for changing frequencies on tx's you must send in your radio
to have the radio properly tuned for a specific channel which is a real good idea
considering you'll have optimum range among other issuses for that frequency.

? 1. Do you have to send in the tx and or rx if the channel is within the current high or low band.
(ex. channel 37 changed to 40)?

? 2. With the recievers, would they also have to be sent in? (I would think they would have to be
but never heard anyone talk about
sending in the rx's just the tx's)

? 3. The 9Z tx has different modules available, would that have to be sent in as well?

Thanks in advanced for the help.