I never really believed that until tonight. I started this strip at a sew day using my take to class machine. I made another strip tonight using different machine. I switch machines a lot finishing up projects. I think I found out why I keep pulling my hair out trying to figure out what went wrong with my blocks! Look at the difference in the strips. All the fabric pieces are cut exactly the same size, sewn together exactly the same way using a 1/4" quilting foot made for each machine. I learned a major lesson. One machine makes a perfect scant 1/4" seam the other measures 1/4" seam but appears to be a thread width bigger. A scant 1/4" does make a big difference!
Tease: One machine used is a vintage Singer 301.