This does add more walls to your drawing, including some short ones, but it offers great flexibility:
- Draw the enclosure at any size.
- Draw the enclosure in most any shape.
- Position the enclosure anywhere along the length of a wall, including at the ends.
- Edit the far ends of abutting walls without worrying whether the enclosure will be affected.
- Edit the enclosure easily, on screen, without dialogs or in-place editing.