Bottom bracket wobble

If your bottom bracket has deep groove bearings fitted you usually find that the cage between the balls lets go first which causes the balls to move together. You would also expect a little extra clearance. Hold back on glue or extra tightening, I'd let it develop or take the beast appart, yes seriously get some tools and have a go, you'll wonder what all the fuss was about. If you ever go down the loctite route be sure to avoid the stronger products such as bearing fit or stud lock as you will have to sweat the assembly out to shift the glue, but would agree that thread lock is a good product.

Urghhhh... Its a sealed bottom bracket....

Stronglight and Tange BBs are both made by Tange. Stronglight don't make BBs anymore.

For a quality one, I would choose Hope. Send it away for a rebuild when it gets gritty, so not so expensive as it first appears.

Doesn't matter if its made by the same same people in the same place, its not the same product, and its not as good as tange or sugino, neither of which are as good as a UN54 or a Veloce neither of which are good as Phil... blah blah.