OMG craftygal, you just named them - Salt and Pepper! I love it!!
You guys are all cracking me up, especially with the comments about keeping one as a backup. I just won't tell you about my Singer Quantum L-500... and my Singer Featherweight 75... and my vintage Singer 66 Red Eye... and my sturdy mechanical Kenmore... and my old Brother machine with the Disney embroidery....those will be our little secret, okay? Shhhhhhh...........!