On their website it asks you to clearly mark that you have a CIA VZ2008, over a CZ version.  I did.  I received my brake and it is loose, I mean real loose.  The tab hole was not lined up correctly so I just put it on the grinder for about 10 seconds, and it lines up now.  But man does this thing wiggle around.  I put the stock one back on, ad it wiggles also, but not like the CNC version.  I put some rock set on it and now it is firmly in place. I am just worried after rounds coming out they may start to hit the brake.  

Am I worried over nothing or is this a valid concern?

I'm told it's nothing to be concerned about, and I can understand with the stock slant brake since that could never interfere with a round but when I swapped the slant brake on my AK with a slotted brake I had the same concerns so I grinded the back of mine down til it could make another rotation and hit the detent pin. It's still loose enough to be removed by hand but took a lot of the wobble out.

I did the same thing but still have the wobble.

If you can't get another full turn before the threads hit the FSB you can buy a high heat "O" ring (rust color) to take up the slop.

my google skills are weak today, and also I have no idea how these things are sized...  any clue what sort of high heat o ring i can use, and where i might be able to find one?

I just got my muzzle break in the mail today and this seems like a nice easy fix to something that's probably not much of a problem to begin with.