I have a few vintage machines, some of which will need some rewiring. I still do not see a tutorial by using the search. I realize that wiring is a complicated concept to teach novices, but hope someone can point me to something simple for the basics. I have a Graybar and a wonderful old Fotomatic that threw some sparks when I plugged her in (foolish, I know now!). I did take care of the foot pedal and power cord on my Singer 15-91, and it works like a charm. Now I'm eyeing the Fotomatic, but need help. Am I doomed to taking it to a shop?