Thanks all for your replies, found a trailer of Rob Cosman hinge system
http://www.youtube.com/watch?v=OB7TNxKi56Y&NR=1
Also Jason I like the 2nd box, I think I have still got a piece of spalted sycamore, so watch this space as they say.
Martin how did you make the tails of your hinges or create the the dowell end, is each section constructed from one piece?
Tried to pick up some magnet discs yesterday from Ebay (£3.99) cheap enough but I do not want or have a Paypal account and they would not take visa cc.