I know from experience it does take practice. I do not have a bernina or a BSR I recently took classes on fmg and the teacher told me my stiches were good and I have had several people tell me the same thing. I do keep practicing but now I am not afraid to do it on my quilts. Have you ever tried silk thread #100?? It is very forgiving and silk thread is very stong. I am sure that is what has helped me using it and trying different designs.