You would need to make sure that the handhelds are upgradeable to suit the new channel separation
IC41S is wideband only i believe so cannot be reprogrammed
GME is also not reprogrammable from a quick search
You will still be able to use the radios with the new channel spacing but audio volume will be reduced when communicating with an 80 channel unit.
I have an IC440 installed in my D3 which I am happy with and it is reprogrammable I believe.
Regards,
Tote
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