Have had my 1/4 inch foot for a few years, it is an add on bought from the shop that sold me my machine. I am not all that happy with it lately. It used to be right on, lately, it is not. Unfortunately I forget to check and find the finished block is smaller. I wonder can the bars that run on the side of it get sprung out? It is frustrating, will have to start checking as I go. I did mention to the shop and they said it is on. My cutting is good, I have checked it, it is that darned foot. Am wondering if I should just buy a new one and give it a try.