I just got my Oberon K2 Cover and Oberon Journal. I took apart the Amazon cover and insert the inside of Amazon Hinge cover inside the journal. First of all, I think the journal is a quarter of an inch wider then the K2 cover eventhough it stated on the Oberon site that both are 6 in wide, the journal is half an inch longer then the K2 cover. The journal is no thicker then the K2 cover with the inner hinge insert. I took a picture of the K2 & journal together side by side and the K2 is actually a little thicker. There are 2 pictures of the Amazon cover when I took it apart. The journal and the inner of the Amazon cover does fold back. If one so choose, you can glue the middle of the cover to the journal. I decided not to glue it together because I will have multiple journals and I can just swap the inner hinge piece without having to buy another Amazon cover. It stays put without having to glue it. I like it so much that I will be selling my red RG K2 cover to get a red RG journal instead. So if anyone want a good deal on the red RG with corners, I will be selling it in the Sell & Buy section of this board so I can order the journal. It's only an hour old! Like I said, the journal is a little wider and a half an inch longer then the K2 cover but not thicker even with the inside of the amazon hinge cover insert inside of it. If you really like the Amazon hinge system and Oberon, and you don't mind the extra length then this is a perfect solution!