Incidentally, as the mount arrived in two boxes, one contained these parts(including those for the axes's clamps, or clutches, and the parts for the RA setting-circle assembly, which had been removed from the mount-head prior to packing)...
I've accounted for all of the parts that should've been included, and they're all there.
The components for the RA worm-block were greased and assembled...
The worm was then attached, and adjusted.
The worm now turns ever so freely and smoothly, as though it's not attached, connected to the worm-gear. Then, the forward portion of the axis's rotations are butter-smooth, easy to rotate. No slop or binding whatsoever with either. It's quite incredible, particularly when compared to when the mount-head first arrived...
Success!
But then, the RA clamp hasn't been installed, nor has the DEC-axis itself, so I'll tone down my excitement for now.