Oil through the PCV outlet was caused by gas in the crankcase which thinned out the engine oil and created too much fluid for the system to handle. I am assuming that the gas was from all the unsuccessful attempts at starting the vehicle while the lambda screw was pegged out against the control plunger of the FD. I hope that no permanent damage was done to the internals. I have replaced the oil, and the PCV system is functioning normally. Oil pressure has been restored.

After sitting overnight, there did not seem to be any gas in the oil. I'll have to watch that.

I am going to spend one more session setting the positions of the air flow sensor plate and control plunger, in order to create the 1-2 mm of play when pressurized at idle. In order to start the car at the current settings, over 8mm of play was generated by the new lambda screw position

After that, I have to determine whether the electronic controls of the CIS are functioning. Initially, it appears that I am getting only 0.6 volts at terminal 3.

I've ordered a fresh O2 sensor.

Is checking the reference resistor a straight-forward task? That thing looks like something from a Tesla experiment.