Hey,
I've had the same issue.
I asked on the Novak thread on RC tech.
This is the reply.
Hi Mick,
The gap isn't something to really worry about, it's basically just a tollerance issue with the sleeve that plays no performance role.
If you are concerned about hte sleeve spinning you can simply slide the sleeve off and put a strip of decal down on the lamination to tighten up the interference fit when you slide the sleeve back on.
(Link:
http://www.rctech.net/forum/6852396-post7069.html)
MiCk B. :-)