I have a 958 CTT that I purchased with a prior tune (prior owner) from a Porsche dealer 3/4 years ago. I was never told of the tune, so I have no clue who did it. The tune often sucks and won't shift into 2nd on full throttle launches until it hits redline and stays there for a second or two. It happens more times then it doesn't. I want to go back to stock and buy a Softronic, but I have no way to get it back to stock. My mechanic at dealer can't do it either.... Is there a way to figure out who and what tune it's running?