Hey guys, I've got a 2004 p59 pcm and it currently has enhanced rtt installed and I want to change it to 3 bar for a procharger tune. I have my stock tune file, and wondering if I need to just write entire on my stock tune file and then change it to 3 bar, or what may be the correct procedure. I have mpvi2 pro, latest version of hpt as of yesterday. The brickable warning is a little intimidating so I figured I would ask the question before taking a chance.
Thank you.