Okay, I am such a doofus!
Turns out I have 8 skeins of the Classy , not 6 as previously stated. More than enough for Twist. Which is good because my row gauge is also way smaller than the pattern gauge!
But in looking closer at the stash, I still spend a lot of time trying to match up patterns with existing yarn. When it doesn't work the way I want (not enough yardage, can't get gauge...) then I often buy more. No wonder the stash has grown to the proportions that it has!
Followed by a 2 hour nap!