I would like to replace the stock narrow band O2 sensor (pre-cat) with a new Bosh wide band sensor. along with a AFR gauge (Innovate MTX-L). In my opinion the only way to do this right, is to wire the output from the gauge directly to the ECU's analog input (pin 15). Has anyone done this? Is this possible with the stock ECU, and without tuning? 2005 Elise.