I've been following the information on making press plates to make your own foundation. It seems to me that making the rubber/latex mold would make a reverse copy of the original foundation and then making a fiberglass mold would just be a duplicate of the original foundation. What I don't understand is how do you produce the new wax foundation by using an original? Don't you need a reverse copy made of fiberglass? Also would like to know more about how this all works. Such as how do you get the new foundation to the correct thickness etc. Maybe I have missed some of the info?