Ther vent is just a small hole drilled in the fill plug (pipe plug) in your reservoir. It's right in the top of the axle. I highly, highly doubt you got much water in there.
I don't. The hole on the fill plug on these is parallel to the ground. First thing I did was extend mine with a 45° and put the hole facing down. There's also another guy who also got water in his after it sat out in the rain and had to modify his as well.
https://www.arboristsite.com/commun...-from-tsc-owner-feedback.346798/#post-7403677