I am trying to design a cnc nest for a plastic part. The part has features in it that need to be filled in and are on complex curved surfaces. I also need to draft the outer most edges up to the top of the nest block. I really have no idea where to begin. Here is an image of the part and an assembly of the blank block and the part to be nested. If anyone could give me some basic tutoring on this, it would be greatly appreciated.