Thank you both for sending the car harmoniser so quickly to us in France.
I did the 240km round trip to Toulouse airport yesterday & definitely noticed a difference.
I didn’t fall asleep on the journey there (as a passenger!) & felt much more awake driving home having picked up my parents.
And a big blind test was the fact that my father (who always falls asleep within 10 minutes of getting in a car & knew nothing of the harmoniser) “felt sleepy when he left the airport but then woke up on the journey”