I had no luck at all with Bernina techs with fixing my 930. I finally found a retired guy who used to have a Bernina store and did sewing machine repair out of his home. He knew exactly what the problem was and now I'm just looking for a new needle bar for it. Techs are trained to work on the machines made in the last 20 years or so. They don't necessarily know the old ones. If you can find an older OSMG, they might be able to help you.