There’s only a little left in the stock tune IMO, if you run Shell gas consistently or other real good pump gas so the car gets used to it, you will get pretty much full spark/timing advance on WOT runs after 2-3 hits and the computer system’s adaptives let it rip. I see you are hoping to go 12.50s and depending on your elevation and typical DAs I think that’s an easy goal if the car is still tight and right. A basic tune and rear tires would go below 12.5 at close to sea level even in the summer I bet.