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Step 3: Flip the PCB over so that the bottom or solder side is up. Insert the
B100k(LEVEL),A500k(DRIVE), B25K(TONEl) potentiometers, and the LED into the
bottom side of the PCB. DO NOT SOLDER ANYTHING YET!!! The LED will have
one lead that is longer than the other. The longer lead goes in the hole with the square
solder pad.