Very nice!  I use Wings, too, and there is always something more to fix.  HOWEVER, I'd say firmly, "STOP!  You're through."  That mesh looks great.  Sometimes you have to say enough IS enough and just be done with it.  It doesn't have to be perfect at a molecular level!  The world itself isn't!

I have to make myself let it go, or I'd spend ALL my time modeling.  It IS addicting, so only YOU can let it go, when you feel it's good enough.  I'd vote for Good Enough.

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!