Often what is missing to make usable Elements of this geometry is the fact, that faces need to be planar to make buildable elements. Also it need to be planar to make extrudes and other solids out of it.    The Two nodes "get Planes" and "ProjectPoints" are a step in this direction.   This example do nearly the same the existing Surface Array already can do. Except it directly gets geometry from a subdivision object.   Anyway this has to be seen as a