I personally don't think it'll help where it matters.

At idle and cruise the ecu is going to change the air/fuel metering constantly in reference to the narrow band o2 reading, I guess you could modify the DA cells in those areas if the o2 sensor happens to be off a hair but I don't see the potential for much real world gains. It's a whole different ball game from carb tuning when you have an ecu measuring and changing things on the fly.

Where it matters most would be in WOT, when you're putting that trust into your wideband on being accurate, it would be nice to have a way to verify it is, but this is a point you wouldn't be able to monitor the site glass anyway.

It's a near product but I don't see a need for it in our application.