Fiat Stilo 2.4 20V Abarth - First start after top end rebuild

First start of the 2.4 litres 20V 5-cylinder engine of my Stilo Abarth after a complete top end rebuild. The auxiliary belt failed and damaged the timing belt. 10 valves were bent. This happened after 175 thousend kilometers and just 2000 kilometers after timing belt change. Even the auxiliary belt was new. Overall repair cost: 1800 € in parts, about 60 hours of time.