I remember seeing it a year ago, hadn't read all the way through it. Did they say what size spacing they were using between them? I've got 1/8 in gap and still lets a glow out so shouldn't be blocking that much airflow I wouldn't think :/ Yeah, still glowing back there, just not as bad as it was.
The corner guards at home depot were only in clear and more expensive than the galvinized metal flashing back in lumber. There are v's in the flashing, not just z