I have a long arm and quilt for just a few customers. I am pretty happy with my free motion and my panto graphs, but some days my SID looks like I'm drunk! Using a ruler to steady the foot helps, but sometimes its not pretty! I try to practice on things that are 1. mine 2. won't show much or 3. destined for the dog rescue pile. If someone wants SID, I will show them what I can do and let them decide. (when I 1st started doing SID on my long arm , I felt like I was taking a bike riding class and was told I HAD to stay on a straight line...can you say: challenging? lol)