How does Tune-Up perk work?

[BulletsFTW]

The description of this perk under crafting says "Allows you to upgrade lower quality components into higher quality ones. "

Does this mean you can upgrade uncommons to rares etc or does it mean something else?

I've tried to upgrade some good looking clothes to a higher quality and all i can seem to do is increase its armor, am I doing something wrong?

 

[mikovsy2]

Yeah, because it should unlock those components in the crafting menu. Though you would want that instant crafting mod from nexus since crafting takes forever.

 

[virtual_icarus]

I think the componets are the crafting materials. I thought it meant items.