Accurate? Hmm, i dunno.

I used to know someone who had a scooby, sold it, bought a saff and fitted the knocklink from the saff.

No matter what sensitivity it was, used to "detect" det, used to annoy me to fuck when i was in the car.

Fueling was fine tho, RR tested, no det at all, used to just pick up engine noise too easy.

IMO if your fueling is setup right you shouldnt need it.

A lamda meter, EGT, or even fuel pressure gauge (or a combo of the 3) is a much better bet IMO.