william rogers: no idea what the jig looks like, sorry.
This is about as close as you can prolly get to being a rebuild w/o it actually BEING a rebuild. It's really more of an extensive calibration.
But, you're on track with working your way back. Since there's a chance that many of the front end bushings/mounts/rubber pieces need replacing ANYWAY...you may as well go ahead and get them changed out and see what's finally left in the steering box play.
For me, the option to pay to have a rebuilt box installed vs paying to have the calibration done was a no-brainer....much cheaper to fix it than replace it.