Turning down Aux fan when printing bigger parts with PLA

I mostly print big parts and my fan settings are 100 for part, aux turned down and exhaust at 20-30 depending on temperature and I get 33-36° chamber temperature with these settings. I started using this after a user here recommended it to me when a large part I was printing lifted at one of the corners from the build plate.
So I was wondering what everyone else likes to set their fan settings when printing big PLA parts.

I printed a aux fan deflector to point the wind 45 degree upwards.

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