The h/w errors are kinda high. What is your longer run average of "hw/(accepted+ rejected)"?
Been running for about 10 hrs now, got:
A: 2792
R: 0
HW: 26
So about 1% HW errors. I have a USB fan pointed at the device. It is warm to touch, but bearable. Using a infrared thermometer, it reads about 92F at the hottest spot. Ambient temp is about 75F.