The Witcher Upgrade Weapons. There is a lot of weapons in the game many of which are very customizable and can be upgraded. This quest will fail if not completed.

Extract dlc and mods folders into your Witcher 3 folder dont use any installation managers. This is why all your mastercrafted Witcher gear which have the same level also have the same armor and damage values. If these values ever change this mod will automatically pick up the changes.
This quest will fail if not completed.
All fixed weapons in the game level via 8 damage per level for steel swords and 10 damage per level for silver swords. Attributes are assigned per item and have no built. This is why all your mastercrafted Witcher gear which have the same level also have the same armor and damage values. Delete the old version run Script Merger install the new one and run Script Merger again.