Originally Posted by Shawn Palmer

Oli - with no time to test or adjust - I would leave what you have on there already. This is a whole entirely new package, and no need to ruin your raceday if turning it off doesn't "make it exactly like the previous version".

And that makes for another caution:
This package is not a "magic bullet" that you load up and it's fast right out of the gate. You need to time to run, check lap times, adjust settings, run, check lap times, and etc for several days/sessions to really dial it in for your car and track. Then report back in with your optimized settings so we can build a database in order to give folks advice for a "head start" starting point when it goes public.

If you are headed for a big race weekend, I would leave the new stuff off till the mains are over and then start some practice time with the new software afterward.