eventually just a 'page - save as' also works to get all needed files.
just to share my approach on this:
i use the FreeCAD Sketcher to do the calculations
i do this after i have designed the 3d model in freecad- so this is the first check if i have read all datasheet numbers / measured all things correctly..
next step is be to write a FreeCAD plugin that can convert a sketch to a KiCad footprint... (if someone has spare time left pleas do it )
but yeah - in the end it would also be cool if some of this just directly works in KiCad...