I bought this board with wheels at the same time that my 10U rack, in December 2005.

Very handy when using large flights fully loaded with amp and a weight hanging evil ...
No need to kill to bring back, there is more than roll.

The wheels are good, and two of which are braked.
The tray is mounted under the racks of the range Audiophony using four large screws. Which gives the whole rigidity flawless.