How many of you make it habit to check the rear derailleur hanger for proper alignment after a new purchase? Obviously, if you see damage, it is worth checking but is this one of the standard must-do steps you mark off in your checklist?

I ask because I am curious if the Park DAG-2 is a gauge worth having around or if the occasion rarely presents itself to justify the purchase.

Or perhaps there is a crafty homemade solution that has already been presented in the past?