>The downside is that I still have to press Ctrl + L at bootup and avoid pressing SPACE before the machine boots, otherwise the machine might try to overwrite m

>The downside is that I still have to press Ctrl + L at bootup and avoid pressing SPACE before the machine boots, otherwise the machine might try to overwrite my system with a clean ChromeOS install You can use flashrom to flash the UEFI firmware from MrChromebox. It will get rid of the ChromeOS recovery stuff and makes it a proper laptop. Remember to backup your data, as always.