Acer c720 mod/refurb Pt.5(Flashing)

Here's the next segment which will be starting of 'flashing of the firmware' note, flash the firmware either way if you're changing out the ssd, don't want to run into any system conflicts like I did earlier. This one is my first hiccup out of numerous ones I've done but never stress when it comes to electronics. Worse case scenario is reinstall ChromeOS to flash it.
https://www.paypal.com/paypalme/twy7chsrepair