No longer needed after version 1.1.6

Until I'm adding a CET file to inject condition stats to Cyberware arm record, this is what you need to do to make Cyberware arm added by another mod repairable and upgradable at the moment.

Direction:

• Find the TweakDBID of the modded Cyberware arm,
• Open \Cyberpunk 2077\r6\tweaks\WeaponConditioning.yaml with Notepad or any text editor, and
• Append the 'CyberArmCondition` to the TweakDBID of the modded Cyberware arm.
  

Assuming the TweakDBID of this new Cyberware arm is
Items.ModdedCyberwareArmTweakDBID

You will want to add this to the *.yaml file:
Items.ModdedCyberwareArmTweakDBID:
    statModifiers: [ !append-once CyberArmCondition ]

If you do this properly, TweakXL log (\Cyberpunk 2077\red4ext\plugins\TweakXL\TweakXL.log) should NOT give a warning or error like this
[YYYY-MM-DD HH:MM:SS.SSS] [error] Items.ModdedCyberwareArmTweakDBID: Ambiguous definition. The value type cannot be determined.


This TweakDBID should be inside the file of the mod that is adding the Cyberware arm.

If you can't find the TweakDBID's, you can always ask that mod author.