Adam,
I have 4 Superior PCB's - two are spoken for.
The trouble with the superior PCB's is the cost - and that we are "so close" to a complete replacement DAC PCB.
Ideally, it be better to merge our "XMOS development board", Superior PCB & Clock PCB onto one board and this becomes a direct MDAC PCB replacement PCB - reusing the rear panel & Chassis.
On the XMOS development board I was able to design critical sections such as the Clock circuit in my CAD system and then Jarek "imported" the design into his CAD system so that I only need to design the critical sections then Jarek is rapidly able to spin a design.
The beauty of this approach is that we can have the PCB manufactured here in Europe with a vendor I've been in recent contact with.
The final decision comes down to the listening tests of the merged Superior + XMOS PCB and the just issued Clock circuit and what to do for a PSU - as the MDAC's current PSU solution is a limiting factor - which will become even more limiting with the mew PCB.
If we de go ahead, then we can have the first PCB's within a month as basically all the hard work has already been done.