I don’t know if this applies to the T-58 but the GE-T-64 had a similar remote topping adjustment. For the reasons discussed in this thread NAVAIRSYSCOM and Sikorsky decided to eliminate the requirement for remote topping adjustments on the T-64 sometime in the late 1970s or early 1980s. The adjustment knob on the fuel control was rotated to its maximum adjustment position thus requiring the pilots to closely monitor the limitations when operating at maximum power. In, the fuel control incorporated a mechanical flywheel type governor that limited the maximum Ng to 102.5%. This flywheel governor was removed on the latest 419 series of engine allowing the engine to achieve maximum absolute power (5000 ESHP) during OEI situations. Ngs greater than 102.5 were considered a one time event thus requiring engine removal once these extreme power levels were utilized.