Hi Gabriele,
Thanks for the info. I was able to import the radio and made the buttons work in SH5:
The only dial control available for the radio indicator (DIAL_RADIO_RANDOM_INDICATOR) randomizes the needle position making it oscillate from left to right until it finds a station. So you can't corelate a station frequency with the needle position. It behaves more like a decibel indicator.

I'll make the need oscillate just a short interval, otherwise it'll look too odd.
Maybe for the R3 model if you could come up with a circular texture for the frequencies that could be places behind a mask for the indicator window, something like this:
... so that when the rotation is randomized, it would look more realistic than just a little needle oscillating.
I'll also add the actual static sound of the Radione R2 to this mod, edited from this video:
I can do two mods for the R2 and R3. The hardest part are the textures!