Used BOSS CS-3 Compression Sustainer pedal in nice condition. Works well, but just doesn't have a good place on my board. Note: It only works with a battery, unless you have the correct power supply. It has the older ACA power jack so it doesn't work with most power supplies. If you're handy with a soldering iron there is an easy mod you can do which fixes this problem. Just ask and I can send you a link.