There's no way around it if corporate sends a tech
All tunes are discoverable, all tunes leave lots of traces
Your local dealer might not notice it, but if you grenade your engine (rare) and corporate sends a tech, he'll find the traces
Credit I afforded you has been rescinded...
Vehicles get warranty work on a daily basis with "traces" of tunes and no corporate tech needed at any ford dealer to find it. The information is under mode9 in the diagnostic menu in ids.. and since ids is live now corporate can read it over the net. And guess what.. There still doing warranty work and there is still ways around it.