No I have not used loctite on either bike, in fact I haven't done anything other then clean the BB shell and removed the lock rings to clean their grooves. Other then that no grease during installation, no loctite, nuthin.

A funny note is that the last time I installed bearings on my Redline was because I was using an old set of BB30 bearings that must have gotten crap into the cartridge, one of the bearings was quite rough when I turned it (After removing the crank of course) and the other side was practically frozen. The bearings had not caused ANY sounds at all, they had just gotten stiff. While installing the new set of bearing I ended up pushing one in at a slight angle and sort of shaved the BB shell a little on accident, I corrected this an installed the bearings correctly and wondered if maybe I would pay for that mistake later.

Long and the short of it was, no. things are still dead quiet even when I botched the installation a bit.

My feeling is that creaking is caused by a bad BB shell. So if you machine it to a crappy tolerance then you get issues.