i have the feeling that when you buy one of these machines, they are basically set up to produce one pad shape.
then, in our case, you can use different rolls of plastic for the outer shell and that is the only thing that changes. Maybe you can change the thickness, and sap ratio, but the "shape" never seems to change. To have a pad made that resembles 1985 huggies, would likely require a dedicated machine. It would be nice to talk with someone who makes the equipment. There used to be a gentleman out of Mexico, I believe, Carlos Richer, who made such machines, I had a few email exchanges with him years ago, but last time I tried, I never heard back.