Be careful with the hub you get from C&G. I got one from them and the 8 bolts that hold the fan on were too short. I had to get new ones and they were hard to find.
I had to buy 8ea. 12-28 X 1 1/4" machine screws.
C&G had the screws in it to keep the thing together but they were not long enough to go through the fan too.
Other than this one event I am very happy with C&G.