Ah, that makes some sense. My extra voice card took a few years to track down and came via eBay from Korea. Even with the limitations this slightly wobbly card imposes it's still my favourite machine and may be the cause of my general dislike of the digital perfection of analogue modelling and plug-ins. I noticed a couple of years back someone got over £500 on eBay for a voice card and for a few months they were changing hands more regularly than I have seen before or since but at prices that were out of reach for me (in fact the were selling for twice what I paid for the whole synth).

I still keep my eyes peeled in case one pops up. I am very jealous of your two machines, I must say.

Cheers
Ollie