2 lessons learned :
- being a cop proves you have acquired a certain knowledge to do your job, but it's not because you're a cop, that you have the needed brains to do your job properly.
- if you're caught for speeding, it may be worth the effort to have verified if the used (vascar) unit was properly calibrated, as such (vascar) units have to be calibrated before using, and also after (I think this means "every x times per y period"). Apparently this rule isn't enforced with very much "enthousiasm" (as it didn't even happen after 5 years of being used in operations)