I have a 1/4 foot on my machine. I move the needle over to the right just enough so that my blocks come out to exactly the size i need them to be. Before I moved my needle over it seemed that some of my blocks would be just 1/8 inch shy of the right size. Now if they are a little off it will be a tiny bit too big and then I can trim it away if I want.
When working on small projects it helps if they are all the same size and that some are not 1/8 inch too small.