Kep, thanks for the help.
I had moved the u-joint buy turning the motor over a little, but that didn't do it.
The broom moved it ok but the u-joint just keep falling down no matter where I put it.
Finally, with the right cuss words, a wiggle and a shift at the same time, it went in.
Thing is, I'll never remember the combination.

Done this over a dozen times and this is first one that gave so much hassle.