Using WDS to Reset Base Idle Adaptations

I have been able to piece back together a fully functioning WDS. It lets me reorient oxygen sensors and reset the TPS, however when I ask it to reset the base idle adaptations, it wants me to input some CO readings, in either ppm or %.

I came across a product called “Gunson’s Gastester”. This device is made to measure CO readings from a tailpipe, for the home enthusiast! Reading up about it, it isn’t terribly accurate, but maybe close enough?

I then thought, what if I just take the car down to my indie garage and have them run an emissions test on the car and use those readings? That would be perfect, and they should only charge me the going rate for a state inspection!

Does anybody have any other ideas or suggestions? It would be pretty amazing if I were able to pull this off with the WDS.

I used a Gunson’s, back in the 70s/80s: no clue if it’d be accurate enough for modern EFU parameters.