Hi all, I found this site some years ago and saved it to my reference archive. It provides a good insight into the principles and practice of distallation and contains illustrations and much informaton.
I tracked down the orignal link and it is still active. For those interested, I have posted the link below. The article is titled Distallation - An introduction.
http://lorien.ncl.ac.uk/ming/distil/distil0.htm
I hope some may find it useful.
cheers,
Icarus :D