What you guys are describing sounds a lot like the initial Calmini prototype rack. Those Hellas on that Rover are huge. I have the 6 3/4 inch 4000 compacts on mine now. They are a little bigger than the old PIAAs and they look perfect.









Lots more pictures here:
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=73;t=000809;p=3

The difference between out rack and the rover's is that their roof isn't pre-drilled and set up with the rack system we have so they have to use the channels to support it.