Abstract: A string tuning system useful for both acoustic and amplified instruments provides a nondestructive method and kit to replace existing thumb peg tuning controls with ergonomic orbital controls. Orbital controls are sometimes referred to as “orbs” and may comprise round tuning knobs that make string manipulation ergonomic. In one embodiment, a tuning assembly 800 comprises a headstock bolt 650, comprising a threaded shaft section 651 and nut section 652, with the headstock bolt 650 fitting into the housing 506 of the string attachment shaft 500. The main wall 103 of the orb contains a perpendicular orb void 105, the orb void 105 being sometimes used to accept an orb set screw 106. The orb 100 also comprises an interior center vertical void 104, the interior center vertical void 104 sometimes used to accept an orb collar 107. The orb collar 107 comprising a main pipe like body 114, a bottom edge 109, a top edge 110, an interior vertical void 111 and a perpendicular void 108.