Rotary Z axis plasma

Exactly, i mean this XYZC system.
i thought these are the same movements as a tangential knife, ist it?
i found some older posts about a C axis and i think this comes really close to what i want:
Tangential Knife/Drag Knife? - Problems and questions - Sheetcam

is it possible to have a reference (G28.1 or G31) in this post processor?
can i just copy/past functions blocks in a post processor? i like to know more about this, any tips where to start?

Thanks, Harold