In an embodiment of the invention, a universal shaft fitting for a cue stick comprises a universal adapter with an extension having external threads, adapted to be bonded into the butt end of a shaft of a cue stick, and an insert adapted to be bonded to internal threads of the universal adapter. The second position is determined based upon the first position and the measured range. The electrical connector assembly further has a number of connecting portions interfering with the inner surface of the mounting holes for connecting the heat sink to the stiffener.