You're welcome. I have always found that understanding the process helps immensely in understanding the answer. A simple "You can't do that" (my first sentence above), while correct, is not sufficient.
If they ever invent a dome (or any other roof mounted antenna) with dual SWM outputs, you will be able to do what you want with your current wiring.
A thought:
Could you permanently mount a waterproof box near the King Dome and put a SWM8 and PI in it? You would have to find a way to run 120v power to the PI. You would move the 2 coax cables from the antenna to the SWM8 outputs, and get 2 short coax cables to run from the antenna to the SWM8 inputs. That would do what you want and the only NEW wire would be the 120v line to the PI in the waterproof box.
