Ray White offers classes all over the country -
http://www.whitesewingcenter.com/repairclass.php
He will be in Dundee, OR in August/September, other locations. There are other resources listed on the sew-classic blog -
http://blog.sew-classic.com/2008/11/...intenance.aspx
Be sure to join the vintagesingers yahoo group; it is a source of all kinds of information. Check out the files in the archives before asking questions.
If you need some machines to practice on, send me a pm. I need to reduce my "inventory" - actually I need to clean out the garage.