This is the see-through model, and reportedly there were only 20 made. This one had failed solder joints in the power supply, and on the front panel. The keyboard needed re-bushing, and there was an issue with every 6th key being louder, and issue with the switching chips also sending audio through the sequencer. We managed to swap chips around so we could use an unused chip section, and are trying to find another chip. The keyboard is being used without the sequencer for now.