Correction for Improvement-club, Flapper by ~Mellonish. Download for full-size, to see what I've writting(though it's really messy!)
I don't have time right now to write a whole explanation for everything in this correction, so I hope this will suffice for now, and if you, Mellonish (or anyone else) have any questions, please go ahead and ask!
It's really helpful, even if it's not used as direct reference. Especially the Turnaround series, they show well how every piece of the face relates to eachother and how a different angle can affect the entire face in a portrait.