If I wish to tear it all out and reinstall from scratch, right?

I'm just about ready to call it quits on performance mods now, and I'm old enough that I think I can content myself with not needing a wheelie bar, but if ESS Tuning comes through with a good sale, I'm going to pull the trigger. I'm just looking for a substantial, reliable power bump. The way John describes his TS1 sounds perfectly fine for me in terms of performance--I just want to ensure I won't be guessing how the car's going to behave.