Hi AlanI had a lot of play in my steering and found that at each point that the steering shaft mates to the universal joints that there is play at the milled “valley” that captures the mounting bolt. As there are at least three of these points, the slop stacked up significantly. I added two set screws at each junction, 90 degrees to each other, to clamp against the steering shaft (see pic) and the problem is eliminated.
Just a thought - take a look at the bottom right corner of page 37 of this catalogue:-
I think you have the same high-strength steering UJs, which need to be torqued to 70Nm (about 50lb-ft) to successfully clamp the spline.