I bought this 500 singer; I had to take the cabinet to get the machine. It has 2 sets of cams the same but no “o” cam. So she never sewed with the “o” cam in place, it seems slow. I ordered the missing cam. So she sewed with out it what needs to be done to the machine now?
Phyllis nm
http://albuquerque.craigslist.org/hsh/2461954713.html