unfortunately you'll have to find a way to brace the bar somehow as the distance from the base of the bar to the spotlight mounts is the issue to much "flex" now stick your heavy spotties on top of that again and you've multiplied that vibration, had a large set of Cibies back in the old days & you had to have a strap bolted to the top of them to stop the "shimmy" that's why people go for the lightbars they weigh less.
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