Thanks, guys.
I'm now got another issue, before I even got to the Loc-Tite stage. I was going to mount the base, rings and scope temporarily, without using Loc-Tite or really tightening the mounting screws, but I stripped a torx screw head. Must have been really weak steel (this was a no-name mount set.) I've had some success at removing stripped screws, and tried my extractor -- to no avail. I drilled into the head and the extractor just sheared the screw off even with the top of the receiver (a Marlin 336). It seems like I've got two options:
1. Drive 30 miles to a gunsmith and get him to extract the screw.
2. Just use 3 screws. The base is a one-piece mount, and the sheared off screw is next to the back screw.
What do you guys think? Thanks again.