If you have a Robinson, David, can it take a 1-1/4in blade? If it's a TD/E, TD/T, EY/E, EY/T or YD/T then it should be able to tension a thicker blade such as a Lenox Trimaster III TCT 2 to 3tpi vari-pitch hook form on a 1-1/4in body. The variable pitch reduces the harmonics dramatically...