It turns out this is actually easier
than it was in F1 2016.
Head to Grand Prix and select the following:
> Track: Monza
> Weather: Clear
> Race Length: 25%
> Rules and Flags: Off
> AI Difficulty: 101 to 110 (Ultimate)
Select a classic car you're comfortable with driving (I suggest the Ferrari F2004). If using Modern F1 Cars select a Mercedes and you'll start near the front.
Use whatever Assists you like and have Flashback enabled just incase something goes wrong.
The above event setup will let you cut corners without getting penalised, the most obvious benefit being the first chicane. AI drivers will still take the normal racing line which means you will gain several seconds a lap on them every time.
A 25% race with these settings will take you about 15 minutes to complete.
If you change a few details here and there you could also potentially unlock the following:
The NOT NOW JEFF! achievement in F1 2017 worth 15 pointsPolitely ask your Race Engineer to stop talking to you out on track The Tinker achievement in F1 2017 worth 12 pointsUse the Multi Function Display to adjust your set-up while on track