Guess my 12 years tell a different story, afternoon fires burn hot and leave less creosote.

Nailing the timeline first is half the battle lol

Read a story once about a guy who found a dead mouse blocking a fan on an old server. It had basically cooked itself to death. Your coffee filter thing reminds me of that. People never think about airflow until something melts. I always tell folks to check the filters on their units at least twice a year. Cheap insurance compared to replacing a whole drive array.