PSA: I tried fixing a bent derailleur hanger with a crescent wrench versus a proper alignment tool. The difference was about $80 in new parts. | DIY Bike Repair - The Community Guide
My old shop teacher swore by the crescent wrench method for years. I bent two hangers trying to copy him before I caved and bought the Park Tool DAG-2. The precision is just on another level, you know? What made you finally decide to try the proper tool?