Here you can find all comic updates, with their corresponding process documentation. Just click yourself to the exact page you're looking for. If you're looking for pre-production process documentation, you're better off checking out the P.D. itself. Link below as usual.
(050503) Second update (page 5) ||| P.D.
(050510) Third update (page 9) ||| P.D.
(050517) Fourth update (page 13) ||| P.D.