 The LFO mod is easy and quick. It changes the LFO from sinusoidal to triangle wave in nature. This is a subtle yet effective change especially when combined with the other mods. | |
STEP 1: Locate D7 and D8 and remove them  D7 and D8 are located next to IC4 near one end of the circuit board. Remove and save these two diodes. | |
STEP 2: Add Mod wires in place of D7/D8  I cut several sets of mod wires about 6" long for all the mods. Strip, tin, and insert one wire into each hole left by D7 or D8. These wires will travel out to the switch where the other resistors will be located. Its much easier to wire the diodes to the switch than to the cramped PCB. | |
STEP 3: Wire the Switch  The switch is wired with the original back to back diodes on one side and no connection to the other side. You can use a SPST or SPDT switch for that. Add heat shrink around the diodes to protect them. Solder this end with a heat shrink tubing to one of the D7 mod wires, and solder the center pin of the switch to the other D7 mod wire. | |
STEP 4: Wire and Test Fit  Wire up the switch (don't forget the heat shrink tubing where necessary. Then test fit it in the enclosure. You can see the two diodes in the heat-shrink tubing in the diagram. The switch is the lower switch on the left. | |
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