I thought you might like to see a picture of my very sturdy home made press. I use this for pressing wet posts of papers, and (when dry) for pressing signatures, etc, for my books. This form of construction is extremely strong, and you get a huge amount of pressuer from even the smallest 1.5 Ton bottle jack that i'm using. A very useful tool. I built it to suit the materials to hand, but it will take A4 sheets if needs be.