The LCR600/UTS sandwich sounds great.

It took a bit of time but we've landed on this as the final layout for lowest noise:
LCR modules need to standup and are wrapped in MUmetal. So we cut some holes into the base plate so the modules would have clearance to stand up.
All wiring kept to the right away from the power transformer box. Tube shields used.

This gives us very low noise (scope jumps between 0.1mv and 0.3mv).
We will soon do a listening session with the original Cole LCR600 compared to this one as there are significant differences.
This is also the most RIAA compliant EQ we ever seen among LCR phono stages.

Got me reaching for vinyl again.