16.? 3 edges to close surface
*** the way i'm doing know is selecting 2 -> loft, others 2 - network, and last one network ! lots of operations !

there was a video of car modeling, where he was trying to refine corners of modified fillet area (fillet intersection)
i will script it


31.? are any options for sliders/buttons on 3d viewport
initialisation menu for selection option, in moi can be applied as for creating objects, or bringing stuff from obj library - well script depended
https://vimeo.com/36732689
https://modelab.github.io/react-radial/