Alan wrote:

Is the bracket you mention internal or external to the duct?=

The "fix", which is supposed to be a bracket of some sort,= is internal to the duct.  It does not show anywhere, which is why I ch= ose not to take the rascal apart to see what they did.  Has worked just= fine since the work was done.  BTW, my duct never sagged so I don't ha= ve much to compare against.
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Mark A. Williamson
Denver, CO
88 Wolfsburg Weekender (135K)