Ehm, I think you've got it very wrong and I hope this is not the way you usually engage in conversations? If I make a statement, any statement but in particular one that is against the norm (boxes don't fry ECUs) I need to support it with some solid argument. The argument can not be "I say X is right and my argument is that where is your argument that says otherwise?" as you're trying to do here. I don't need to provide any more technical information other than what is known and was stated already: that the voltage tinkering of the boxes is not able to fry an ECU (if you are still skeptical over this you can study some basic electronics, don't ask me to prove Ohm laws here) and that so many people running them (including yourself) have never had such a
problem. That should have been enough for you to question the admittedly weak "explanation" from the VW tech and maybe look up other causes that played their part. The comical analogies of hurting yourself during intercourse or smashing your fingers only prove a user error from your side, not a failure of the wife or the door surely so another own-goal there.
And yes it's possible to learn new things every day, but certainly not everything I know was learned in a day (common reasoning is sitting in a corner, absolutely terrified at that conclusion).
At the end of the day though, you can just ignore everyone here and stick to whatever cause of failure sounds easier to comprehend and accept, box, weather, fate are all good alternatives since no interest in discussing actual facts is shown .
