One other crazy detail I didn't have space to put in the article is that half of the driver chips are mounted upside down in cutouts in the circuit board! It's

One other crazy detail I didn't have space to put in the article is that half of the driver chips are mounted upside down in cutouts in the circuit board! It's so the data bus and some other control signals can be daisy chained between them without needing another layer in the PCB.