[quote=Stitches] Understandable. I don't mind waiting on the creator of the system to post an explanation, on the basis that you guys don't mind if I skip that particular section of the CS, for obvious reasons, until a good way of explaining it has been thought up. [/quote] Absolutely, feel free to skip it. Most of us (read: all of us) skipped it as well until Yoshua helped us out :P