Why do you insist??
Again, there’s no servo in Mk2.
There’s a resistor divider on Vocm.
The Vocm situation is the same in Mk1 and Mk1.
This is from Ted Smith:
the Mk II doesn’t have a servo. It uses the same type of opamp as the Mk I (not the same opamp, but a similar one) which both have the ability to set the output common mode voltage. The opamp in the Mk II has a much higher input impedance for the Vocm input which firms up the bass, but there is still a simple resistor divider setting that value. <…> that 5V comes from a resistor divider in the stock Mk II just as it does in the Mk 1.
The main difference between Mk1 and Mk2 around the opamps, again, from Ted Smith:
Everything except R5 and R6 are 0.1% (Thin Film, 1/10W or 1/8W, 0.1%, +/-25ppm/degreeC) R5 and R6 were 1% thick film. They should be thin film as well, but Paul liked the sound of thick films there in the early releases. After software updates and especially with hardware upgrades upgrading R5 and R6 to the same specs as the others sounds better.
This might explain why Mk2 would have more consistent DC offset measurements. I just noticed that nobody here had measured it.
This also confirms my suggestion that in Mk1 we need 0.1% not only R5-R6, but also the the feedback resistors. I bet, with all 0.1% resistors Mk1 would also have consistent measurements of ~0.3mV… and we would never spend so much time paddling this.
PS
I forgot that I noticed that Ted implemented 47uF on the Vocm in Mk2. This alone might or might not explain that stock Mk2 has firmer bass than Mk1, but this improvement we all noticed when added capacitors to Vocm in Mk1