Thanks everyone for the suggestions. DH loves to tinker and can get things working that others have thrown away. His greatest joy is buying a vacuum cleaner (or anything) that is messed up and fixing it to work better than new. I know Ray White is the guy I was trying to contact so I will work on that now for classes in the spring. He would just love learning from an expert. I have many machines that need tweaking and I guess I will have to give him one to work on (play with). I love the old machines but I am not mechanically inclined at all. Thanks for the help.