I designed this mod to help feed the Switch with colder air than what was being pulled from the heated box where the warm circuit board was located. I was able to get about a 15 degree drop in air temps going INTO the Switch. Combine that with the already cooler air going into the other port and you have a very effective cooling mod.
The mod is 100% removable, and requires NO cutting, NO soldering, and leaves NO traces of its existence behind after removal. If you damage your dock, just take the mod out, and pop it into your new dock. THAT'S IT! Almost TOO easy, isn't it! You're welcome!
PRINTING: This should be printed with the slotted end down, and the opposite end up in the air. For supports, ONLY print using supports from print bed only, otherwise you'll end up with supports INSIDE the model, which are not necessary, and not worth the extra work to remove them. I print mine at 60mm/s, 2 walls, and 2 top/bottom layers.