Brom, surely thats the whole point of Closed loop lambda ? Stu ?

Although I've not used it yet I have gone for a Pectel monitor, not specifically for aiding mapping but mainly monitoring the engine, combined with a Stack and a wideband you would have to be a fool or have REAL bad luck for an engine to let go imo.

After viewing my mates Power FC on his GTR over the last few weeks its changed my mind on keeping simple guages, I'm just not 100% confident on mapping which is why I would leave that side of things to Stu but surely no matter who maps it you could still have component failure possibly leading to a engine failure.