Hey Muhammed, thanks a lot - the feeling is mutual.
I've been poking at it tonight and *very carefully* shifting those lines over to the right a bit. I have put some marks down where I want them to go, but am hesitant to lay then down too heavily just yet. I felt I had to change it, as I'd done a smaller study in a sketchbook earlier and failed to really get the gesture of the head right - which is what I love most about the original. Updated version below. I'll edit the original post when I can get to a computer, as I'm on my phone just now.