[TR] installing a u-joint

[Randall]

> They would not finish moving into place without rather too 
> much force, or so it seemed.

If they get hard to move right at the end, then chances are that you've let
one of the rollers fall over and get trapped between the end of the cross
and the cap.  Only solution at that point is to take it apart again, and use
heavier grease (plus more care) to hold the rollers in place.

Do NOT increase force applied, as the cups are actually rather fragile and
will break.

Randall