Quality levels continue past Legendary, although the displayed quality will not reflect that. Each new level increases armor ratings by 3.6 and weapon ratings by 1.8, resulting in an increase of about +0.1 per effective skill point for armor, and +0.05 for other items.
Can this trick be combined with spell, alchemy, and/or enchantment stacking in order to make ungodly powerful weapons and armor? Could you theoretically improve a single piece of armor alone provide the 567 capped armor rating, or a mere dagger that can kill a giant in one hit?
