Simple rectangular tray design. Inserted straight tapped holes on one end from Hole wizard. No problem with placement or insertion. When mirroring to the other end, using the right plane as a mirror plane, it tells me the holes created would be disjoint from the body. Even though the preview shows them exactly where they are supposed to be. Holes also do not propagate to part drawings when using the hole wizard in an assembly model. There is no "propagate to parts" option.