So, it seems to me everyone uses SCT on their trucks. My buddy has a Roush mustang and he uses it, my dad has a roush f-150 and he has them, is this because they are ford friendly, or just the best? I am looking to get one, but being as i have a warranty, i cant load a tune, can i still use it to monitor stuff? or will the act of just plugging it in void the warranty?