Hi Pete,
I've put some photos of the Bison Bag here
http://picasaweb.google.co.uk/SailormanJohn/BushcraftBag?authkey=IgPhd-ebq2M
There are also some on the Forum of a modified pack here
http://www.bushcraftuk.com/forum/showthread.php?t=18147&highlight=bison
The newer packs, like mine, have...