Up for sale is my never solved Karakuri Evolved secret box by KCG, designed by Akio Kamei.  Box Size: 80×80×80mmCompartment space：23×23×23mmSelling not because it was too fiendishly difficult, but rather because I had a failure of the old grey matter and managed to buy two of the same puzzle in quick succession.  One (that I've solved), I am keeping to add to my ever growing Karakuri collection, but this one I'm putting up for sale. Puzzle is in as new condition, removed from the box p...