While the sewing machine is in the shop.... list of possible feet

Hi there!  While the new-to-me Singer 500A Slant-O-Matic Rocketeer is in the shop to be cleaned, oiled, lubricated and brought into working condition, I came up with a list of presser feet.  I had bought, from a different person, an original box of attachments that had several feet and all but one fashion disks or cams.

Singer 500A Slant-O-Matic Rocketeer Presser Feet

1. General Purpose Foot
2. Straight Stitch Throat Plate
3. Straight Stitch Foot – One “toe” longer than the other
4. Seam Guide
5. Special Foot
6. Zipper Foot
7. Invisible Zipper Foot
8. Roller Foot
9. Evenfeed or Walking Foot
10. Overedge or overcast edge joining foot
11. Free Motion foot/Darning Foot
12. Button sewing foot
13. Buttonholer attachment
14. Circular Stitch Attachment
15. Cording Foot
16. Ruffler
17. Bias Binder Foot with Guides
18. Gathering/Shirring Foot
19. Teflon Leather Special Fabrics Foot
    
    
    Can you think of any others for the Singer 500A?  If so, please let me know.  Thanks, Kathy