Vintage Arp Quadra synthesizer

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"This is an Arp Quadra with some moderate wear and some minor damage. The damage includes a removed power switch (it is on whenever the power cord is plugged in), a removed programmer switch (it is always in programmable mode), the tip broken off of the BASS OCTAVE SWITCH (DPDT), and the tips broken on of 5 sliders: MASTER VOLUME, EXT VOLUME, PHASE SHIFTER RESONANCE, STRING BASS VOLUME, and ELEC BASS RESONANCE - looks like all 100K linear taper. I have used this instrument and never replaced any of those because I can still use the broken sliders and switch. There are 35 sliders but only 22 knobs are included, all but 2 have white markings on them. I have no idea why the others were missing. I have been keeping them in a separate plastic bag. Everything but the knobs are easily replacable, although I'm not 100% sure about the power switch having an exact replacement. There is also a hole drilled into the control panel near the right end of the keyboard which is the right size to add a 1/4' jack. The photos should show all the wear.

The good news: The membrane panel switches all still work perfectly. The original fragile key contacts have been replaced with much more durable ones. The synth still sounds beautiful. I tried several combinations to make sure it still works right."