Panda Roll Filter & Default GNSS Constellations

I believe I know my answers already but I want to be sure.

Any Panda based system ‘Roll Filter’ should be set to ‘0’, correct? Default is at ‘10’, what effect does this have if not changed for Panda.

Any system using a Teensy with ethernet = Panda, correct?

The latest firmware and config files for the ZED-F9P make use of all the the constellations, correct?