I got the 3 series as a Christmas gift, it is a smoking machine.
I also want to add racks, mine also came with 5 and I am going to add at least 3 but could also add 5.
Just not sure how much it will inhibit the flow ?
I wanted the bigger one but did not have the heart to tell my wife she got the wrong one.
I did also got the cover and it is easy to put on and appears that it will last a few seasons anyway.