Thanks for the useful info on your various pages- there is a lot to read 
Having read this, still unclear if my ACER C720 chromebook is suitable? I may have missed something obvious of course!
HWID is PEPPY-C6B-N7C-A7C ; PEPY-EOL-SCREW
If it is, is there a printable ‘all-in-one’ guide to use?
Many thanks in advance.