Ideally, with a finger release the shaft should be just outside of the centerline of the bow, because that helps counter the sideways force of the string sliding off the fingers. With a skinny shaft, this is difficult to see unless the shaft is further outside the centerline of the bow than is necessary. I prop my bow against the tailgate of my pickup truck, and put an arrow on the string. This allows me to stand back and really get a good look at where the arrow is with respect to the centerline of the bow. If there is no obvious centerline mark on your bow, you can temporarily put a piece of adhesive tape on the limb near the riser and mark the center on that. Every time I thought my arrow might be too close to the centerline, a close observation showed me that it really wasn't. But if it was, I would put on a thicker strike plate.