I'm finding it really hard to tune so that it's safe in all conditions, when I have zero hills around me. 0-120km/h is one thing, but 6 min climbing a 7% grade at full boost is something entirely different.
Tune to be 100% safe for 95% of YOUR normal driving, then watch gauges for the abnormal stuff.
If 6min climbs up 7% grade is your normal, tune for that