On the internet I was able to buy a DXE-RR8-HD remote antenna switch cheaply, just the switch without the controller.
The reason to buy this is because all unused antennas are connected to ground. In this way I hope to detune those unusual antennas and this saves me another whole network .....

Because I now make the controller myself, I can also use my own design right away.
Because I sometimes change antennas regularly, I have not chosen to name all antennas on my illustration.

I will write this on it later with an erasable marker, so I can always give it a different name.