Room to build.

       .________________________________.
       |                                |
       |  U N I F I E D R A C K         |
       |________________________________|
       | o |                        | o |
 12U   |   | :::: :::: :::: :::: *  |   |
       | o |________________________| o |
       |   |                        |   |
 10U   | o | [====] [====] [====]   | o |
       |   | .................. *   |   |
       | o |________________________| o |
       |   |                        |   |
 08U   | o | [====] [====] [====]   | o |
       |   | .................. *   |   |
       | o |________________________| o |
       |   |                        |   |
 06U   | o | [====] [====] [====]   | o |
       |   | .................. *   |   |
       | o |________________________| o |
       |   |                        |   |
 04U   | o |                        | o |
       |   |    [ YOUR NEXT IDEA ]  |   |
       | o |                        | o |
       |   |________________________|   |
       |________________________________|
         |___|                  |___|