Poor QC on the machining
"Overall construction of the door is solid (which is why I didn’t rate a 1). Poor quality control required about 4 hours of handwork to correct before install. Every mortise needed to be redone. They were 1/4 inch deep at the center and 1/16 at the edge causing the door not to fit when hung. This is billed as a “flatpack” prehung, but obviously was not assembled to check fit."


