Originally Posted by oneclick

My understanding is:
TA and Stronglight only made one axle - in terms of distance between the ball-races; they had Italian cups that were sized to make up the difference.
Campag made two axles twice - one pair (68 and 70) each for "thick" and "thin" cups; the thick ones having helical grooves in the exit holes.

I can't see what would be causing the overhang of the adjustable cup.
Check the ball sizes?
Check the zero on the caliper?