Okay, here we go...
I placed the standard smallest Troika scissors from IKEA to add proportion. The lighter green is foam rubber, the darker is plastic. Until now, it worked pretty well
*crossfingers* but as for the Cybook, I wouldn't build the protection this way, because the "original" cover doesn't stick that much to the device (in fact mine did fall from the cover, I sent an e-mail to Bookeen but, erm, I know it might take some eons for them to reply
). In fact, my re-elaboration of that cover was tape! </ends OT>