A long and belly length putter fitment system includes a lower shaft section, an upper shaft section, and a coupler to join the upper and lower sections to form one singular putter. Discrete time bandpass filter is used to generate delay and can replace SAW filters in a wireless frequency translating repeater. The apparent electrical length of the conductors is tuned with the reactive tuning components so it is equal to be about n\u03bb4, where n is an integer \u22671 and \u03bb is the wavelength of the signal to be detected. The method further includes generating a tree data structure. The torque index sensor shields magnetic field interference and improves operational reliability.