I've got the stuff to use pcm hackers and ls Droid. Do the systems in question in title lisence by vin number? I under stand both are great with slight differences. If you have an unlimited lisence for either do the still require vin or are you in kinda the wild west. Reason I ask is I've seen the epa show up at a dsl tuner with a warrant and send out notices to customers that they need to prove the big trucks are back at stock tube before they can register them again. I don't want to be on their radar lol