There is a known fault with these DACs which means that sooner or later they are likely to fail. Do you have a non-functioning one ? I would like to buy it for spares.
I've a DaCapo where the caps leaked and redesigned the circuit board...AFAIK all components (other than the caps, obviously) are in good order. However the circuit board has been with John Westlake a while now, I hope to get it back soon. PM if interested.