If you change the left/right of your arrow say for paper tuning, would you not need to redue your fourth axis adjustment? In your illustrations is the bubble not in the center because the level is twisted as you are laying it down, or putting it in the next plane? If this is the case then will it not be fine on your bow as long as you set the 3rd axis to your style of grip so that it is perfectly perpendicular to you. Then when you are in the other planes, uphill/downhill, it will be fine? Right? Im a little bit confused.