Forgot to ask a couple more things.
I read somewhere it will work with the piggyback style units as well, will this then show the true signals for what is actually happening in your motor or just what the original stock ecu is "seeing" after the piggyback unit has changed the values?
Also would this work with re-written ecu's that have had speed cuts taken off or written to suit bigger afm or injectors?
Sorry if any of these questions have been addressed already.