I have a Singer 99, a smaller version of your 66, that I am using for the first time to piece a baby quilt. I love it!!!! It is a great straight stitch machine. Actually prefer it over my Husquvarna with all the fancy stitches. In the middle of piecing, DH showed up with a strap from his back pack that needed reinforcing. I didn't change any settings and my little work horse just zipped right through it. Give yours a good cleaning, oil all the right places, and enjoy! I think you'll be surprised.