The dependencies of a kinetic glass transition volume (Vkg) for hard spheres, and the corresponding amorphous close-packed volume (Vka at infinite pressure (NkT/pV0= 0), upon the number of spheres, the initial volume and the rate of compression, are examined in the context of two recently published conflicting viewpoints. Both Vkg and Vka exhibit characteristic upper-bounds at the instantaneous-quench limit and decrease with reduced compression rates. The behaviour of Vkg and Vka for slower compression rates, beyond the present resources of MD computation time, is uncertain. The possibility of lower-bounds to Vkg and Vka associated with a quasi-thermodynamic transition as conjectured earlier, remains plausible.