OK, all sorted. Was easy-peasy as mentioned, however having never removed one before, had no idea what I was in for. Worst thing about owning this car in Australia is I can't just run to my local wrecker/dismantler, or have something mailed overnight.
Can be a PIA, which is why I ask on here first - just to be sure
Save's me having my car sit around a few weeks un-driveable waiting on parts because I did something wrong and buggered it up.
For those who may be in the same position as I was:
Inside the crush-can. Remove this nut, then insert wheel puller into the two threaded holes as shown:
The Wheel Puller set-up (cost $11.95). Simply twist, and the crush-can slowly slides of the spline. Takes about 20 seconds.
The guilty party. Loosened the screw a bit mode, dropped some thread lock behind it, then tightened it up. Now it's perfect. Nice crisp movement.
Then put it all back together again, nice and tight.
To put the crush-can back on, it won't simply slide back on - it does require effort. Don't try and bash it on though, you might bugger up the splines. Simply place it on, then attach the large nut inside. As you tighten it, it will slide the crush-can back into place.
Also ... before you take the crush-can off -
it'd be wise to mark with a line with some chalk (or something non-permanent), on both the crush can and column cover behind it. That way when putting it back on, you can align it to where it was when you took it off so your steering wheel goes back to where it was. I didn't do this and had to take it off and do it again so my steering wheel was aligned. 
As to what
dodj commented above, you actually
can't access this particular screw through the holes in the crusher can.
Thanks all for your input.
