(base) time@time-OptiPlex-790:~/Documents/mlord$ ./download.bin ../../Downloads/car2-developer-v2.01-final.upgrade 10000 /dev/ttyS0
Turn on empeg unit now
Found empeg unit: entering program mode
Manufacturer=0089, product=88c1
Starting erase [Bad result code: 0xa2

Yup. Increments to 24% and then errors.

I've even tried briefly shorting the 3v cell on the mainboard and retrying the reset in hopes of forcing a reset, but get the same results.