Hello, I am trying to make a breastplate that scales on Int instead of Dex. I have added the Int bonus with no problem but cannot seem to remove the Dex bonus. 

I've set the Dex Bonus in basic information to 0, added a Set - AC Max Dex to 0, and a Set - AC Max Armored Dex Bonus to 0. However, AC when a character wears the armor still includes the Dex bonus. 

Is there something I am missing or another way to remove the Dex bonus?

After adding the modifiers, did you re-save the whole Magic item using the main [SAVE CHANGES] button?

I used the [SAVE CHANGES] button and re added the item to the character sheet.

It might be easier to start with a different armor that already does that and ignore the stealth disadvantage and finagle the AC. I honestly don’t really know for sure.

Thanks. I'll tinker with it some more and see if I can get it working. The character it is intended for can't wear heavy armor but I might be able to ignore proficiency on it.