..The first adjustment is to have the fundamental part of the tap tone (as well as the highest part of the tap tone) match all along the bow stick.
..If the tap tone (fundamental) is too low, then scrape even amounts from each side of the stick in that area until the tap is raised to match your goal frequency.
..If the tap tone (fundament, or lowest part of tap) in a certain area is too high, then scrape even amount from the top and bottom of bow in that area until it matches your goal frequency.
..If tip is too low in fundamental tap tone, then scrape side of bow head; if too high, then scrape material from front edge to lower tap tone to goal frequency.