From what I thought the microedge has the lean cut off. I wired my wideband to it, and picked the aem wideband selection on my microedge controller, and I couldnt figure out how to set my lean and rich settings for it to shut down the nitrous.

 

There is an option in the Triggers Menu that has MIN AFR and MAX AFR. Just set those to what you want and you should be good to go.