http://www.quiltingboard.com/t-43881-1.htm
There's 400 pages here, but folks are really knowledgeable and you can find information about everything. The expert is Billy (Lostn51) who rebuilds and paints machines and knows ALOT, but there are many people here who use vintage machines. When I wanted to know which one to buy to make purses- this is where I went, and they steered me right!
Enjoy.