Add me to the Rola/Unistrut list.
I used deep channel unistrut...a 10ft piece cut in half. My mounts are the unistrut channel mounts in the stock "gutters" with a hex screw and washers. The spacer is simply a threaded coupler measuring 1.5". What I like about the set up is that the tension on the mounts to the roof rails is separate from the tension on the basket. I've had it all installed for 5 days now and no wobbles/looseness at all. I bought the Rola and the extension. I really like how it all looks put together.
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