I guess you know you have a good detector when 3rd party coils come out.
Mars MD have announced a set of new coils to fit the Makro Racer:
http://en.marsmd.com/new-coils-for-makro-racer-and-fisher-f11f22f44-metal-detectors/
Mars MD have announced a set of new coils to fit the Makro Racer:
http://en.marsmd.com/new-coils-for-makro-racer-and-fisher-f11f22f44-metal-detectors/