OK, I'll admit it, I do, sorta. It's the only job I would even consider and I originally proposed it to my Management a few months before I FIRE'd. Little did I know they'd be jiggy wid it. My terms were consulting or special projects that could be performed in a non time-critical time-frame. IOW, stuff that would be of benefit to the company, could be preformed in the background with no deadline, would make use of my years of experience, and would be interesting to me, and could be performed on a totally flexible schedule requiring no more than 10 hours of my time per week, with no more than one day on-site.
So for the last 12 months, and probably about 12 months more, I go in to the plant once per week, usually but not always on Thursday (cause it just seemed like a good day of the week) for about 8 hours, with a couple more hours doing research or monitoring systems from home. And I'm totally out of the chain of command, don't have to supervise anyone, and have extremely little supervision of what I'm working on at any given moment. All this and I still get my ending hourly rate from my full-time higher-stress career, which was pretty good
As you can see I could never find a better deal, it adds to the nest egg, and it will be easy to ease out of when the times they are a changing - it's no longer fun - management changes and they decide I'm not all that necessary - I move out of state, whichever comes first.
Good work if you can get it...