Looks good. You could even have the Mame32 logo carved in the top space permitting like retroblast did with their trackball controller.
I haven't played with that software yet, does it allow the importing and exporting of the plans? And if so, would you be willing to post your plans in case anyone wanted to build a controller similar to yours?
Maybe we could get a collection of basic plans that people could then tweak to their own specifications for various controllers.
Might save lots of time and sell lots of controllers for those guys if that could be implemented (if it's not already).
-Dweebs