[danner]

Just as a side note: I see, Danner, with the photo you supplied showing how the ferrites are attached to the cables, there seems to be water inside the enclosure and reasonably sized holes top and bottom of the enclosure where the cable ties go around the outside support. 

Do you have any concerns that the moisture build up could cause problems for the circuit board in future (eg corrosion or a short circuit)?

The water in the picture fell off the top of the enclosure when I opened it to take the picture. I do plan on doing something more permanent and sealing those holes. I've checked it a few times after rain and surprisingly no rain gets in through the holes.

As for corrosion I used a conformal coating to hopefully prevent or minimize any corrosion on the leads or anywhere else. I also used silicone dielectric grease on the pins for the connectors.