Examples can include a system for flipping components in REVIT or other BIM software. A plugin can receive an indication that a flip has occurred in a plan displayed on a graphical user interface (“GUI”). The plan can include an assembly that has a handedness, such as a door or window. The plugin can determine what the handedness should be based on assembly parameters indicating mirroring, facing, and hand flipped. Because some assemblies cannot correctly mirror without adjusting handedness, the plugin can determine the appropriate handedness and replace the assembly with a different assembly when the handedness is incorrect after flipping. The new assembly can display in the GUI at the correct location.