This has been brewing for several months
Based on the Buchla SOU265, but all the rare components replaced with regular parts. So the noise source is different, the 0.05-50 Hz VCO is op amp based, S&H sections changed to use hi-Z input op amps (ie not 741s), no 24V power source required. It is not a clone, but functionally about the same as the original.
Eurorack compatible, pots, LEDs and sockets all mount directly on the PCB (44 x 90mm), Eurorack panel will be available too.