And Later Still:
Very curious…having gone ahead and rotated the steering wheel to lock, then mapped out the angle of the lower steering shaft to rack spindle lock screw hole, and then using this to establish the assembled position of the upper ps tower spindle flat coinciding with rack centering via the inspection hole (see first photo, took a bit of fiddling), I come to find that the witness mark on the spindle cap ends up aligning perfectly with the spindle flat! (see second photo) I have never seen a reference to this, but for now - I’ll assume that I’m on to something!
