Wheel Nut:
That is not bad advice, unless you are on ADR or in a village, they tend to turn a blind eye on the Route Nationals
Correct.
The golden rule for France is to always show an uninterrupted ONE HOUR BREAK on your card, as opposed to a 45, which, although a pan European standard, does not satisfy the French.
Once you have satisfied this condition, you are free to barrel along on the limiter and no one will bat an eyelid 