Feature requests for "Fin" and "Offset surface"

[spb (Steven Burzinski)]

@Rhino_Bulgaria

However, no matter how loose is the tolerance I set in the Command line, it still creates a fin surface with way too many control points (compared to what the same surface looks like when I apply ! _FitSrf to it with 0,1 mm). Is there a way to make the output fin surface with even less control points?

spb_Fin.py has been revised to do this.