Very boring situation! I hope you can recover quickly from the losses you had.
But I would like to make a suggestion, taking advantage of the fact that you will have to rebuild some things.
In this case:
[9]

Avoid using extensions!
I would suggest using technical gutters, something like this:

You can see more explanations here:
https://trenchltd.com/products/pvc-u-trunking.htmlI don't know this brand, but it was the only one I could find with information in English.
This will help to reduce heat near the outlets and in turn reduce the risk of problems.