It's not harder to tune; you just need to use a weaker spined arrow than you would use for a bow that is cut past center.
Since the shelf is not cut to center, or at least not cut past center, the POI for arrows will initially be to the left of where you are aiming (RH shooter), whether you aim with the arrow point or instinctively. From my experience, this is a little easier to correct if you aim using the arrow point, because you can just look down the whole length of the arrow a few times and it will be obvious that you need to move your bow arm a little more to the right. When aiming instinctively, you just have to wait for the ‘ol internal computer to adjust, I guess. People seem to not want to make these adjustments every time they switch from rd to asl, so they generally settle on one type or the other.