Heard a guy at a shop talk about using a dial indicator to check tool runout on every setup, I always skipped that step

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Wait, has anyone checked if that dial indicator setup itself is introducing runout? Half the time the issue is the indicator holder sagging or the magnetic base flexing, so you end up chasing a ghost. I used to skip it too until I realized my indicator was reading its own bracket's movement. Now I zero it once, tap the spindle, and zero it again before trusting anything. It takes ten extra seconds but saves me from redoing a whole part.