if you can adjust the needle position on your machine, your stress can end in just a few minutes.
use scraps for this. line the edge of the fabric up with the edge of the foot. sew a line long enough for you to measure the seam allowance. using this line of stitching as your starting point, move your needle to the left or right. move it one click at a time until you find the 1/4" setting.
if you do that, and always move the needle to that position, while lining the fabric up with the foot, you will get consistent 1/4" seams whenever you use your walking foot.
don't forget to (1) write down the needle position; stick it on a piece of paper or paint it somewhere on your walking foot; and (2) put the needle back where it belongs for your other feet.