We put a pool noodle under ours. They don't rock or swivel. I put a strap or small diameter rope through the center of the noodle with a carabiner on one end and a loop on the other, hook them together around the base and it is easy to remove when in use.
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Married To The Navigator
2005 Red GMC Duramax 4X4 HD Crew Cab
2018 North Point 315RLTS
4" Magnaflow, Banks Air Intake
Firestone Ride Rite Air Springs
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