I think I have the unbeatable deal. When I rebuilt the engine in my 1970 280SL I was working as a foreman in a Saab dealership. We were slow at that time and since I was the only hourly mechanic I always dropped off the work first to allow my flat rate mechanics to keep making a living. I had done all the usual cleaning and organizing tasks when my employer allowed me to rebuild my own engine on the clock. I was paid to rebuild my own engine.