Thanks for this thread and detailed pics. Made me decide not to do it, as dealer install was only $510. I'd have to pay for $141 diagnostic fee either way. They didn't find any debris in there, just a broken fin. But it's plastic like so many parts these days, so it could have easily broken off.
It's not even 1 payment on the Model 3 we'll order, so I'm trying not to be too upset, but at only 32 k mi, it seems premature to already have such issues. I didn't have AC problems on my Accord until 90 k mi.