CP for my Ace of Spades, based on a 46x46 grid. A very thin black and white square of at least 40cm is recommended. The base is pretty easy to collapse, but the shaping is very hard. The half-spades on the CP indicate the approximative location of the symbol, made with the bottom point, once the model is finished.
* Additionnal notice : the zigzag creases are NOT color changes. They are just there to help with the collapsing.