Skyzone goggles fan mod

The Skyzone SKY02S V+ 3D is a nice pair of goggles but it suffers from the problem of fogging as soon as I put it on. While most solutions aim to replace the face-plate, I like the original face-plate and want to keep it. So I created an add-on with 2 U-shaped ducts which bend around the face-plate to extract moisture from the eyes.

The mount is designed for 25mm fan. I use a 12V one from eBay and drive it directly from a 3S battery's balance plug.