I have read several posts mentioning how expensive it is to purchase Bernina's extra feet. Am I missing something? I have owned several Bernina's for over 25 years, including a serger, and have only needed to purchase one extra foot; the walking foot for my 930. All the other feet came with the machines. My 930 does not have a 1/4 inch foot, but I don't need it. I have a mark on the machine to follow. The other machines came with walking feet, 1/4 inch, and any other foot I could think of.