Maybe the poster will correct me if I am wrong.
moleskin found in the aisle for care is where I found mine. Find the 1/4 inch on your machine, I use a small ruler and set the needle down on the 1/4 inch mark of the ruler, but the mole skin right up to this make, the mole skin is adhesive on the back. Test your 1/4 lining your fabric against the edge of the moleskin. You may have to move it a tadd. Hope this helps.