Is this for the MX400?

Do not CA the control links, they will have to be adjusted periodically. But if you mean the screws holding the balls to whatever they mount to, yes, loktite or CA these for sure (don't get any actually on the balls! Use the tinyest possible amount).
Loktite will attack most plastics, CA doesnt stick very well to CF, there is a Tamiya threadlocker that works ok for metal-to-plastic without getting ridiculous like CA.