Hot take: your finish pass shouldn't be taking off 0.03, and I learned that the hard way last Tuesday
Ran a batch of 40 aluminum brackets at the shop in Tulsa and bumped my finish pass to 0.03 to save time, and every single one came out with chatter marks. The old guy who trained me always did 0.01 max and said the tool needs to cut, not rub. What depth are you guys running on your finish passes, because I'm second guessing everything now?