I put on a new belt, I had to adjust it several times by cutting it off in half inch increments. You really need the correct chair to sit in while treadling. It can’t have wheels for sure. I was sitting on a diningroom chair, but I kept slipping around. The machine needs a good cleaning and I think it will sew smoothly. I give the ladies of the past credit for making clothes on a treadle, it will take a lot of practice for me!