I don't worry about it unless I'm making swap blocks and then I don't worry very much. Pressing & cutting are more important to me in achieving the correct size but my Elna pulls fabric much more smoothly than my other 2 machines and came with a true 1/4" foot. On my older machines--I had to pay much more attention while sewing--especially long seams to keep my 1/4" true. Since I learned to do it on fussier machines, maybe I'm over-estimating how much better the Elna performs but I don't think so.