@WRDJ205 If all three radios are supported by chirp, you will be able to copy from one to another easily.
Read from each radio separately.
CHIRP has to identify the radio it's dealing with in order to write to it properly.
Some radios are the same internally but many aren't. It's safer to use a separate code plug for each brand/model.
Save each file(code plug).
Now, it CHIRP, with all three files open, you can easily copy rows from one to the other even though they are different radios.
Connect each radio one at a time and use the matching file to write to the radio.