The problem with peak recall on an A/F gauge is that when you get off the throttle the car will go very lean as the TB has closed and Fuel has been cut. Every time you do this it will register very lean and honestly be worthless. It could potentially work the other way but then it would only be showing you how rich you were at one point.
yes I will be adding more AEM digital gauges (2 actually) in that same panel and reviewing each one as I go
Eric