Hey, my MS-20 is getting noisier by the day. Even with every pot turned down (besides volume) there is a noticeable hiss! Could this be due to old capacitor wear and tear, or perhaps its the filter/vco trim pots needing some tweaking? Anyhow, I live in the SF/Bay area and am looking for an analog synth guru to service this bass beast! Any and all replies are welcomed! THanks!