I did individual cylinder adjustments on a CNP test engine since the EGTs were scattered. The engine had to stay at full throttle for a relatively long time. I had the luxury of the customer's dyno that had 8 lambda sensors. I first balanced the AF ratios and then played with the steady state timing looking at both EGTs and the effect of timing on AF. Picked up almost 3% torque. CNP made it easy and I didn't even have to leave the control room.

A secondary note: I scoped some of the high impedance signals and saw very little electrical noise compared to what I normally would see. I could have had listened to an AM radio in the same room.