To do this, fold the piston head and the piston shaft, but do not fold the base. Then, stick the piston shaft up inside the head and glue it. Then you need to stick the shaft through the base and THEN add the labeled A piece to it. Fold up the base and it should work. I will make a video tutorial later. Comes with bonus redstone item, credit to Maki and Valkyrie
How to Print?
1.Click on the papercraft design image.
2.Make sure it has not been resized by your browser (you might need to click the image again).
3.Print using your browser's Print function.