To Greg: I agree about the lambda. With the variance in fuels today, i.e. E10 as in my immediate area, "regular" elsewhere and who knows what with "winter blends", we need to be thinking in lambda instead of "gas" AFRs anyway. I think it's the old school mentality that still wants to think in pure gas AFRs, which no longer hold true in reality.
ktoonsez: I've had a config file setup to log V from the AFX. I would need to dig up old logs to give any worthwhile feedback, though. I you have the HPT Pro, though, you can just make a little "bridge" wire on the green plug from the WB. On that input you can define the signal as voltage and log it, if that helps.
BTW, Happy New Year!!