I have fitted the Compbrake mounts and as said, they're awesome for the money. Loctite will only stop the lock ring from loosening. I didn't bother with it, I checked it after every drive and re-tightened if needed till after about a week they stayed tight. Put a bit of paint over a bit of thread and the lockring and you'll see if it starts to loosen.
When you tighten the lock ring all it does is compress the 2 rubber washers against the turret to get a grip of it, Giving it room for movement. Whereas the Mark Fish mounts are bolted directly to the turret so no chance of movement.