There is adjustment on the tension. I have helped do adjustments on them. Unless in this specific case, the topper is already maximized out re tightness. Tension adjustment process is the same as for an awning adjustment.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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