Took me most of the weekend, but I got it in and working (or at least it seems like it is!)
The only real problem I had is that when I went to cut the hole for the bypass in the return vent, I didn't tighten the pivot point enough on the circle cutter tool I had and the hole ended-up being oddly shaped by the time I realized what was going on (hence the square patch in the photo).
Other than that, I'm pretty happy with how the project turned-out... especially when I powered it up and everything worked as planned. It figures that it's been raining here for the past day or so and a bit warm, so the relative humidity isn't too bad in the house. I'll have to wait until it gets colder before I can see if the humidifier actually solves the dryness problems I was hoping to solve.
For those of you who own a Dremel tool, I found using it with one of the new "quick connect" steel cutter discs to be a great way to cut the square opening for the humidifier. I cut a nearly perfect square and the edges weren't too sharp. I also used it to cut a 1 ft. piece of 6" duct... much nicer than using a tin snips.
