Victoria Takahashi kindly coached me on the making of matrix dies and using the die press. My first try was with recycled metal from the bottom of a cake tin, using 6,000 lb. of pressure, padded with multiple layers of Z-foam. The die was made of cast polycarbonate, drilled (low speed) and cut with a jeweler's saw frame and spiral blade. I am planning to assemble with rivets and add a stainless steel wire pin to the back to make a brooch.