and to anyone saying a Der. Hanger should not be pounded on.. MOST Der. hangers are made in a stamp mill.... under thousands of pounds of POUNDING and SHEARING force
and "checking with a ruler" is a great way to check them for a "slight bend".
next time, you "experts" should advise doing the ruler check on the inner side since it was the downside during STAMP FORGING and is one of the Reference Surfaces during the MACHINING step of the processes involved in making a Der. hanger.
to thermonicscott.. now you're building a strawman. I hope you defeat your imaginary opponent!
i'm going riding now... a fast downhill awaits my attention... the comencal is aired up and ready to fly.