Hi Neil-

I completed that Benzene thing.
The final solution is at
http://users.accesscomm.ca/john/BenzeneE.GIF
but if you want to see it step by step,
view BenzeneA, then B, then C, then D before
viewing BenzeneE.

Benzene solved

http://users.accesscomm.ca/john/Benzenepreview.GIF

Copy and paste the above link to see
the first 10 frames of an animation
that tracks the electrons in a Benzene ring.