I am a bit anxious to unscrew the barrel assy, but it probably has to be done.

My next Light Pattern will be a "very good" one, I now sort of know what to look out for...

What kind of Loctite would you use to put it back together?
I was thinking about the blue variant, which should seal fine? Red might be better, but if the cylinder needs to be removed in the future, it will cause a headache.