I did receive the extra crossbar I ordered (for a total of 9). I will eventually get 2 more to fill in all the holes. AND I realized last night that I have to remove the awning to install any extra crossbars, so the extra one I currently have may wait for the other 2 to show up. But removing the Rhino Rack mounts is easy with 2 people holding the awning up, and they won't change position.
For anyone who might be interested in these mounts I initially installed all 4 mounts to the vehicle, then all 4 upper nuts for the awning while on the vehicle, then removed the whole thing and installed the lower nuts on the awning before hanging it back up. Once I got 2 screws started on the mounts I was able to let the wife go and finish the other 6 alone.
Prinsu also makes these mounts and I almost ordered some before I found the Rhino Rack mounts. But these will only fit 2" wide crossbars, so you would need to order that size if you want these.
http://www.prinsudesignstudio.com/pr...unting-bracket