Sorry, couldn’t resist.
I can’t really help you on quantity but I’m pretty savvy on caulking for houses and industrial uses. Just because what you see ‘looks’ questionable I highly doubt that a reputable outfit like Cirrus would use a caulk that would only last 4 years. I would also lay money that it is in good shape where it needs to be which is where you can’t see it.
I know we’re all bored but don’t go making unnecessary work for yourself –
you’ll give layabouts like me a bad name! ?
It’s good to be a n00b - so I can aspire to be just stoopid.