I remember a friend saying “if you hate someone, stick a potato in his car’s exhaust pipe”. He will most likely start digging from the engine, make his way through all imaginable parts but not the exhaust pipe.
Today, I was that silly mechanic once more. I went through many methods, double and triple checked many numbers and dived into some theoretical discussions even. Almost two days of struggling just to find a stucked potato, just 10 minutes before Friday ends. A copy-paste error between two closely named variables.
I should find a nice exhaust pipe photo, or a desktop toy, and keep it somewhere visible.