Sorry, a Featherweight is a really old Singer machine from the 1930s to 50s. They weight about 10 pounds and are great for traveling or quilt workshops. They only have one stitch.
As for the walking foot at Joann's, it was with the sewing machine attachments and I didn't pay to much attention to it as I had one already, it looked like the one that I had picked up at the show. I have a Janome 6600 which has accufeed, a built in foot if you care to use it, so a walking foot is not needed.
I'm glad that your quilting is getting better. The more you do it, the better you get. And the prep does really pay off. I'm always so anxious to get started, that I used to cut corners - not any more.