I'm delighted to report that the little devil seems to be FIXED! With a shop bill that was for once lower than expected.
In a fit of pure overconfidence, we planned to meet friends on the Italian Riviera on Friday, then visit my father at his summer house in Southern France on Saturday, before returning home Sunday. Near 1500kms of mostly non-highway roads in 3 days. All before even knowing if the car would be fixed in time or if the faults would return a short while later. The baby will be arriving soon and adventure time is running out, so we just went for it.
It all worked about as well as possible and the Boxster took everything we threw at it. Only trouble was a speaker whine that appeared on day 2 and resulted in the passanger side speakers going completely silent on day 3. The aftermarket amplifier installed in the frunk by a previous owner rattled itself loose on the just APPALLINGLY AWEFUL roads on the Italian coast and disconnected somewhere, should be an easy fix. But thanks to those "roads", I can now be confident that whatever is still on the car will stay there forever.
As our route took us by Monte Carlo, we naturally had to do the little detour and take us through the famed F1 tunnel for some unnecessary noises.
View: https://www.youtube.com/watch?v=lC9VByRIonw
Going back up *west* of the Alps, it's always important to state just how gorgeous the area is, all of it lined with prime driving roads wherever you go. Incredible, please go there.
View: https://youtube.com/shorts/xUKnqD-XTPw
Not much left to say at this point. I'm still very happy with the little Boxster, it is perfect for these sorts of trips. Convertible is just great in these areas, it's nimble and powerful enough for any driving road, it's small enough outside to fit on even the tiniest of roads, yet big enough inside to seat 2.5 people comfortably for 11 hours straight (Sunday we left at 10 AM and arrived home at 9 PM).