Photo of the subject breather.
A caged fiber disc, and this one actually works like a check valve,
so I’ll have to paint it up now. I only found smaller and larger core
plugs in my stash, so I JB Welded the hole that I drilled in the plug to
pry it out, tapped it back in place, and used a little thread locker.
Grandpa would be proud I didn’t buy a new core plug!
Prepare to be boarded!