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Switch of some sort to the integrator Op-Amp (U3-10). Cut the current 12-position rotary switches are actually 8.8mm but require more on the front Don't put R8 so close to R26 - D36/R47 too close - Clock Rate - variable resist +6k between U2-8 and U2-9 - Reset Socket to U3-3 = capacitor measurement roughly 15nF (has a resistor footprint between +12V and Reset.

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