I thought i had posted this before but can not seem to find the thread so sorry in advance if you have already seen this but this is my setup for dehumidifying my engine. Its a 4000 sqft room dehumidifier off of amazon and some ventilation piping from home  depot that i used to direct the air down to 3 inch pipe to fit over the oil fill tube. The other end fits into the packing foam plate that came with the humidifier to protect it during shipping and works great when you cut a hole in it matchi