Difficult choices

I looked for a case that could be suitable for Archos 80 Plat (200x150) .So difficulty forcing me to try to guide future buyers their choice .Voila ds:
Imagine opening a book; coverage is the tablet holder, the back is keyboard support .You open this book and read it in landscape format .You have the open front cover you.The odds ext = 285x180 3 23mm clips lg found: that of 1 top = 150mm in the center and the two lower clips (see the photos), it can go up to 180mm (top of the holster clips // 2 = the left (from the edge of the GCHE cover) to 70mm (taking the axis of the side ds clips), the other at 215 mm (always starting from ds to Left edge and the axis of the clips) .L'épaisseur 28mm.Le back of the book covers the keyboard works .If perfectly prblmes config QWERTY physical keyboard install a free app store ds play .A little big for my tablet but ...!