I have received telephone feedback from the MTM dealer that the series of engine breakages is well known also to the famous German trainer. Broken stock engines and engines are easily broken. The cause seems the poor quality Italian petrol that creates detonations with consequent breaking pistons or crankshaft bushings (due to greater pressure due to detonations). I'll show you information as I received it. But I think it is true as he has advised me to wait for what Audi decides (see any recall campaign) before processing cars (against his own interest).
I went to check log I had done on my stock car ... even with gasoline Q8 100 octane (I think the best available on the Italian market) on the second but especially on the third cylinder the control unit also corrected -3%. Even with a DVX map this correction did not emerge.
Reconnecting the information found by forum users, there was a break on the third piston. It would be interesting to know from the two forum users that unfortunately they broke if they often alternated 100 petrol with 95 octane gasoline. Making a pull immediately after full 95 octane with control unit that was calibrated to a 100 octane gasoline could give rise to dangerous detonation.
Perhaps on the FL have adopted less robust components than the PFL where these problems have never emerged.