> So somewhere around 120 Euros/$165 USD retail. That
> doesn't seem unreasonable, to have just one or two,
> for curiosity's sake. I understand that cost could
> change depending on the specs. I would prefer at least
> 8x8 unless they could be linked, then 4x4 would be
> sufficient.

8x8 will be a problem because of the 3U limitation. We could use smaller
potentiometers and knobs (those planned for the keyboard controller) but I'm
not sure if 8 potentiometers/knobs one on top of the other will work with
3U. In any case the output sockets cannot be located below the knobs but
e.g. on the right side.

Best wishes
Dieter Doepfer