ok. Im trying to understand how i won't have to reprogram my ecu every time i change something (like adding a supercharger or N20). I paid $400 for my last tune and don't want to have to go throu that evertime. What are my options? Also, can I just slap on a supercharger with my mods listed below or what probloms will I run into? I know there is alot of threads on this stuff but Im looking for some advice from someone who can help my specific situation(current mods) thanks!