Gene, that seems like a great idea! Where did you get it? I've been thinking about removing mine just because I am not sure it does anything. Anyone agree?
In addition, while cleaning snow off my rv roof last week, I broke/cracked the bathroom exhaust fan cap and both plumbing drain caps. Luckily I was a mile away from the parts place owned by the dealer I rent my space from, and replaced the fan cap right away. I held off on the other 2 because I was wondering about those 'cyclone' and other directional/swivel type caps. Anyone try them?