Years ago, 40 something, I took basic sewing lessons from a great teacher. If you could sew a shirtwaist dress with cuffs and collar, you could sew any garment. I tailored for years, 5/8" seam allowance. I was taught by her to concentrate on the seam allowance, not the needle. Then I started quilting. I had to get that 1/4" seam allowance. I used white adhesive tape, used with bandages. I taped that down to my machine and I had no more trouble. You know the needle is set because you started to sew, then watch your seam allowance because the sewing will continue until you stop. I did not have any more trouble. And I have 7 machines but I am not telling anyone. No one saw that in this writing. haha