The current status of large-diameter Y-Ba-Cu-O QMG^® bulk superconductors is described. 75mm-diameter QMG^® samples with fairly concentric trapped-magnetic-flux-density distributions have been successfully grown. In addition, a record-high value of the magnetic levitation force, 171kgf, measured at 77K using a 90mm-diameter Nd-Fe-B magnet has been obtained for a 100mm-diameter sample. The crystal orientation of subgrains in the sample was determined using Electron Back-Scattering Diffraction as well as using a conventional optical apparatus including a He-Ne laser. For the sample grown under normal process conditions, the maximum value of the [001]-axis misorientation angles at the subgrain-boundaries we obtained in the c-substructure region is 2.9°. However, in the a/b-substructure regions, the misorientation angles are larger, and the maximum value obtained is 6.6°, exceeding the critical angle at which a significant reduction of the critical current density occurs in Y123 thin films due to the weak-link problem.