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The Valve Caster 2.0: Tube Boost and Overdrive : 7 Steps (with Pictures) - Instructables
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The Valve Caster 2.0: Tube Boost and Overdrive : 7 Steps (with Pictures) - Instructables
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DIY Audio Electronics from Zynsonix.com: Matsumin Valvecaster Guitar Effects Pedal - Tube Overdrive
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