qcasey1

Curious, did you get a shipping update yet? I'll try your image as well if I can figure out my serial drivers

Heatsinks for the Raspberry Pi will work, although ~1mm small. Copper > aluminum in my experience. Check out AliExpress or eBay

Even with a heat sink and a fan I encountered thermal throttling under load as well, using the Debian image. Worse transcoding performance than a Raspi Pi 3B+ but that's probably unrelated