I am having trouble identifing some of the foots. They are hard to tell the difference. When I tried using some of the cams my needle thread keeps breaking and was trouble shooting maybe I am not using the correct foot. I would like to use some of the different stitches for crazy quilt I want to make. Also is there a walking foot you can get for the Kenmore high shanks or a good website for parts on these machines or my 221 featherweight?