I'm trying to provide adequate support in a drywall ceiling (steel stud bulkhead) for a glass door pivot hinge. The glass is to be flush with the face of the bulkhead (right on the corner bead...), but I have to put some sort of structural support in with limited invasion. My thought is to use MDF, cut it in to the drywall and re-tape/mud the works, repaint, etc.
Will the MDF constantly crack the taped & mudded joint? Any other ideas?