Thanks guys, forgot about the Voice + Filter setting. Seems like solution for this approach.
I got a weird vco calibration where where vco1 was -40 cent in two lower octaves on half the voices, c0 and c1 octave at transpose -1. vco 2 was close enough. So attempted to make a video with daw and 2 tuners showing each vco going up the scale. Everything worked but the panning.
Still thinks though that having square wave lfo, bipolar, should never place signal anywhere but left or right depending on amount to the Ladder or Steiner pan. Two out of three key down it places anywhere.
And as I tried doing about 10s cycle on lfo, it does not retrigger as expected either. Running higher rate with many cycles each key down it seems to work though. Retrigger issue it seems.
EDIT: this was utter nonsense by me. I forgot to set Stereo to full counter-clockwise, and then it places each voice differently obviously, not as I programmed. Square lfo works just fine.
My bad....
EDIT: Voice + filter did the trick, absolutely perfect. Prepared if it happends again. Right now tuning is fine.
Tuning as been really stable for me, did nothing since I got PB which is three months ago. It did though deviate needing to use Fine Tune to match piano, so thought time to do calibration again. If something depending on how many pitches are off doing calibration it fails. Will also see if temperature on panels are higher being running for a whole day, and not do calibration then, not sure what happends. Also first time with fw 2.0 doing calibration if something changed. Seems deliberate that exactly 3 voices are about same pitch, and 3 others too pretty close to each other. But only in lower octaves though.