He continues: “Is there anything else I should do to maximize safety and accuracy, such as, for example, closing each dowsing session with a repeat protection prayer, or would that be unnecessary?”

This would be unnecessary having already carried out the work. What would be a good final step would be a request for continued divine support in understanding and utilizing the information in the highest and best ways through all you do or not do, that it be drawn from divine wisdom, whether cultivated within you or provided as guidance and an inspiration on an ongoing basis through your partnership with the divine—that would be a better use of the opportunity.