Performance Shifter: Attuned or leveled

[Ukase]

So, if you want the leveled version, it's only available for levels 21 and up. So you can slot it at 18. 
But if you can get it attuned, you can slot it at 17. 
Not a big deal, the attuned will work just as well...but perhaps when you folks get a chance you can make things consistent.