ZaneMasterX
FRF Addict
of course, there are always risk of breaking stuff when you mod the car. I don't know how good is Ford on detecting custom tunes. But most tunes are reversible back to OEM tune. Usually mild tune only increase the boost by 1-3 psi. That being said, Ford might have a way to notice you had a flash before. But on the case of my old Subaru STI, the factory tune is just crap...it was safer to get the car tuned with correct AFR.
Ford is releasing factory tuners for their motors that retain factory warranty. They will obviously be more conservative than a pro tune but at least its a tune that keeps the warranty....