Here are some rather rough plans for the Dutch press I built. The problems that I had in the first two versions were first, not enough leverage, then not enough space for my newer and bigger mold, then the lever arm mount broke under high pressure, so I doubled it. This version accommodates a mold that will hold curds from four gallons of milk, and with the block and tackle that I have attached to the lever arm and base gets a 10:1 mechanical advantage. Here's a picture of the press.
Dave in CT