About adjusting around any problems, the Lotus mechanics said that, with Jim Clark driving, if they made a change they only had about 2 - 3 laps to measure the time difference. Anything beyond that and he'd have adjusted to cope with it and be doing the same time as before the change.
The more I read about Clark the more I suspect if it were possible to choose a greatest ever he'd be the one. Sadly he was before my time as I only started following the sport in 1976 when I was 10 years old.