Here's the Tools For Self Reliance Manual mentioned above:
http://www.tfsr.org/publications/tec...achine_manual/
Rain's blog is very informative and he has a good tutorial on rewiring a 201:
http://vssmb.blogspot.com/
Sew-Classic sells supplies but also has some tutorials:
http://blog.sew-classic.com/categori...ne-repair.aspx
There are a lot of manuals available free in the brand-specific yahoo groups. Just join and start reading their files and conversations.
Ray White offers training workshops in several locations each year:
http://www.whitesewingcenter.com/index.php