I'm loving my new vintage Kenmore, but i've had a heck of a time getting a precise quarter inch seam. It only has a regular foot and the configuration of the foot and feed dogs don't allow for tape on the plate. Of course i put tape on the bed but still not good. So today i was fiddling with it again when i noticed that someone had scratched a mark on the plate. Hmmm...could this be a quarter inch mark? Of course it is! Thank you, previous owner, you had to be a quilter! Who else would do that!