I’ve made a major script update that will just update/restore the BOOT_STUB area of the ROM to load SeaBIOS, as well as flash the full ROM’s of previous, backup/restore your product info (serial no. and hardware ID) and flash a shellball ROM. The main advantage of leaving the majority of the ROM alone is hopefully quality and consistency improvement. However, in some cases this will mean that suspend does not work and VMX is disabled. I will write more, and update the FAQ when people give feedback.
cd; rm -f flash_chromebook_rom.sh; curl -k -L -O https://johnlewis.ie/flash_chromebook_rom.sh; sudo -E bash flash_chromebook_rom.sh