The improved tuning mechanisms include a novel Global Tuner arrangement to extend the spring holder to comprise a lever pivotally connected to the inertia block or transverse element to additionally share, along with the thumbwheel element, the load of the counter springs element and, thereby, improve the ease of threading the thumbwheel element. In a preferred embodiment, the customary secondary spring holder is extended to provide a shaped end to facilitate pivoting such as an angled cutaway or taper at the extended end of the secondary spring holder element to provide knife-edge portions.