I've just found that my Acurite 5n1 wind vane is broken again. I checked my notes, I installed the current one Dec 2019, so about 13 months of use.
Like the last time, the "tail fin" that takes most of the wind loading cracked off.
Replacements are only $5 USD, though minimum shipping is now close to $9. I didn't think far enough ahead to order more than 1.
Are other people finding the wind vane to be particularly brittle/fragile? Have you replaced it more than once?