It's including atmospheric pressure, and it's the way it reads in the Link ECU. So yes you're right but drop 1 bar for atmospheric pressure and that gives the result.
Target is still 1.2bar but hovers around the 1.25 area.
Fronts: bolt-on
Rears: adapters and need to address 170mm to 190mm step up in hand brake size. Thicker handrake shoes/inserts/DBA rotors.
I had inserts, afaik @Invisible runs DBA rotors specifically designed to address the issue, does not know of anyone running thickened shoes.