Back to straightening a cast steel flint hammer. I am not a believer of bashing stuff w/hammers , and or using heat which can ruined the tensile structure of cast metal. I break more stuff w/hammers than I fix. (laughing)....I've had huge success tweeking flint and percussion hammers w/wrenches. 1. Remove flint hammer from lock. 2.Put the two flat sides in a good vise w/ brass sheet metal padded jaws. Put the vise jaws lower than where the bend adjustment will be allowing for a long bend adjustment rather than a short adjustment area. Those short bends can break off. 3. Use a foot long Crescent with it's jaws on the flint jaw area , and gently tweek the stem of the hammer , allowing for a tiny amt. of rebound in the bend. If it's not enough , give the twist a tiny bit more. .....I've fixed several misdirected hammers this way , w/o breaking any. ......No offense meant to those that like to use other methods.