I wouldnt recomend using the simulated wideband output personally on the techedge, by defualt its at 14.9 which i feel is a little lean, also it means that as the wideband sensor goes out of calibration you dont know, but if you have a seperate narrow band sensor it becomes VERY obvious when its out of calibration as it starts looking like the closed loop is at the wrong value.

So i prefer two sensors, and a narrow band sensor is pence secondhand anyway.