I soldered a standard fan header on a nd now I'm using a fan on the rear to cool the Gamma; dropped temps quite a bit too!
https://image.nostr.build/40587c5b93d5328d17136955d3c5a4c47a7b1258d830a9aef...
Do you have an idea of how much your temps dropped on average? Where did you source the header for the fan?