Was rebuilding a swivel a while back; new railko and bottom bearing, new seals and wheel bearings.
After attaching the stub axle, I was having problems getting the swivel to move from lock to lock.
Stub axle off to have a look see, pulled the CV out, looked fine, put it back in, still the same.
I did this about 5 times and then finally it was fine.
Now engrossed in a job that I'd soon be finished, I put the hub, track rod and brake caliper back on.
Then went to fit the drive member, hmmmm, where's the splined pokey outey bit?
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turned around to find the CV sitting on the ground behind me.
Pulled it all apart again, put the CV in and discovered that I'd just had the CV pushed in too far which was limiting the lock.
Was working on my own, so can't even blame someone else.