I once bougth a used Mini cooper s and after some time decided to give it to my ex-wife. We owned a normal mini during our marriage and the cooper s was always something special, fast etc. It was (according to me) exactly like that, fast, cool etc. Anyway, she didn’t want the car so i sold it. Having used the car some months, i sold it to a German surgeon with eyes for detail and probably plenty of spare time to fill with his nurburgring hobby. I drove the car to his office in Germany where we made a testride through the mountains. It took about 5 minutes until he told me something was wrong with the car. Not really wrong but he could tell me from behind the wheel which airhose probably lost pressure going full speed. Without negotiating he bought the car. A good week later he texted me that the car had its missing 15/20 hp back. 😐. I was very happy with the car. Visited about 20-30 different cars before buying that final one. But no matter how happy i was,if there was an Adam J who would have told me im not getting full potentional, I probably would have gotten even happier after the repair.
conclusion for me: please make people use their gear to the full potential if you notice they are using it wrong or somethings is wrong, and dont back down mentioning (helping) when having the risk it temporarily hurts.