[AcampoDave]

Here's a couple of pics. The first one shows the mounting of the electronic box on the inner fender with the o2 sensor lurking below on the pipe by the starter.

The second is a shot of my virtual guage on my phone while the truck is at idle. The rich lean parameters around the circle of the guage are adjustable so you can narrow the scope of the linear reading below. I found that when I did that, the new narrower range showed on the dial and the color changes from green to yellow to red adjusted to suit the new parameters. For example if my lean limit was set at 17 then 15 was getting into the orange territory. Leaving a wider range kept 15 AFR in the pale green territory. Notice how the linear graph is tracking the last 20 seconds of run time. That is adjustable as well, but since I have no device to log a greater time span, I just left it at the factory setting.