No Bob. There is nothing that would prevent someone from installing any other type of grill.
The point of the original post was to help determine who the manufacturer was and then edsnova posted "Not a "hibachi grill" so it's not a CMC, right?". I simply posted that was not necessarily right, because we've all seen CMCs that have been upgraded to the three bar grills.
I don't get all the confusion and the hostility of Danny's post.