I bought a Moog Opus 3 polyphonic synthesizer on ebay. The first thing I did was to take it apart and found the foam behind the front panel was decomposing. After a quick search on google I found that other people have the same problem and took the sliders off the PCB and cleaned them. So tonight I have started the same task.
Now that I have cleaned the sliders and used the Moog Opus 3 for a few hours, I am now thinking of mods that I might want to make to it.