The locktite has worked flawlessly...thanks everyone.

One observation...i think part of my problem was that i mounted the light/laser combo like it's pictured on the box...centered...laser on one side of the scope, light on the other.
Because the laser was mounted off to the side, if the target was closer than the distance I zero'd the laser at, the laser's point was off to one side...at longer distances, it would be off to the other side.
I think this condition confused me a little bit at the time, and I may have thought it was moving around because it was loose.
What i have since done is rotate the mount so the laser is centered on top of the scope...that way, i can adjust elevation in my mind for various ranges, but it stays put L to R.
Hope this helps anyone with a similar issue.
