I am overwhelmed with the amazing amount of information you know! I would never see all these things together and have a clue what they were and I can only guess what they do. How is it that some are only simple attachments with curves and some look like walking feet? Can you tell any more about them. I am figuring they were to sew hemlines yes? So were some folded to fit within the older attachments? And then the more complicated ones..did they do all the work for you?