A shaft assembly includes a cylindrical body with at least one recessed slot. Each recessed slot has a length aligned with a main axis of the cylindrical body, a width and a depth profile. The shaft assembly also includes at least one tab, each having a base and a fin portion. The base of each tab is adapted to engage a corresponding one of the recessed slots within the length and the width of the recessed slot, and has a base profile to match the depth profile of the recessed slot.
