It brings me great joy to find (and correct) mistakes. It's like saving a life proactively. Even if the problem had a very low chance of danger.

I recently found branch circuit grounding conductors connected to the neutral bus bar on a subpanel. There was a grounding bus bar, but the sub was so overloaded with cheater breakers that it's full, and on the neutral they were doubling up. Even more frustrating was the SECOND subpanel located a mere foot away, also started out with full size breakers, but now filling up with more cheaters.

I said out loud "Urrrrrrrgghhhhh!"
So I wouldn't offend anyone.

One thing I haven't figured out yet. It could be a coincidence, but at one jbox, with that circuit off, my meter was reading 2volts DC. Weird. With the circuit energized but not connected to the load, I was reading 39 volts AC on the LOAD side! What the #^$#

I don't like unsolved mysteries. I gotta know how it ends.