Michael McGuire RPT is the owner of iBuySteinways and Maestro's Music International. He is a registered Craftsman in the Piano Technicians Guild with nearly 40 years experience in the piano industry. Here is how the Guild defines a registered craftsman:
A Registered Piano Technician (RPT) has passed a series of rigorous
examinations on the maintenance, repair, and tuning of pianos. Only RPTs
are authorized by The Piano Technicians Guild to display the logo
containing the words Registered Piano Technician.