TennTak is the newest CQB site. They're rapidly expanding, and it's a really fun place, but it can be a booger to find.
Just wanted to help anyone out who had as hard a time finding it as me, at least until they get some signs.
Google Maps link here:
8910 Valgro Rd Knoxville, TN 37865
https://maps.google.com/maps?q=8910+Val ... CDUQ8gEwAA
The bulding you're looking for is a packaging company, not Bullet Boats.
Once you get there, you need to pull into the parking lot on the right side of the building with the rounded roof. It's the biggest building there, if that helps.
There are two double-doors, probably cracked open. Just head upstairs from there, and you're good to go!