When I have points to end in a seam, I put a pin through the point and on the 1/4 line of piece sewing through, if off slightly it doesn't seem to matter in the long run. I usually leave this pin sticking straight up and remove when near pressure foot when I can see that needle is aiming for that spot--actually 1 to 2 threads to the right of that spot. I also place regular pinning on each side of the point for stabilization.