Tech21 Killer Wah troubleshooting

[wordstep]

A used Tech21 Killer Wah, gave sudden big noise during Wah time.

Opened it up, found that part of the PCB can be shorted by the "Axis" of the wah.
Put a washer under the PCB, problem solved.

I believe other Killer Wahs probally have the same problem, especially when the Wah is stepped really hard.