Another Try at the Bottle, Perhaps

Will the madness ever end?  It seems my pesky little friends the Carolina Wrens are set on vexing me again with a maybe-it-is-maybe-it-isn't nest in the Colonial Williamsburg bird bottle just over the garage.  They started a nest earlier this season, abandoned it, and some other bird cleaned it out.  Now the wren-ish debris is back in and I wonder if this is a real project or a con job.  All we can do is watch and wait.  This had better be real!