Thanks for your information and perseverance.
I actually find Point-extruder to be highly instrumental in the creation of exterior scenes.
Still, besides ushering the vertices themselves to and fro... there are other, more arcane uses of them, is that not true?
On the more serious side: When you drag\cleave\edit surfaces and sectors ( possibly attainable with edges, as well) while holding down shift, as opposed to Ctrl, you might be able to streamline the aforementioned operation to adjacent vertices rather than the grid. This may sound hazy, confounding or even slightly disturbing, and I can conceive that.
Trouble is, I am not at all conversant with this technique myself and have heard scant of it, so...
