You might know it or not but there once was an article on the blog of this shop called Arts Cyclery.
It listed derailleur ratio, cable pull and sprocket pitch for all systems up to and including 11spd.
Unfortunately it has since disappeared. Later I found it through wayback machine and even printed it but yeah now it seems gone except for scribd.
If anyone is signed up to their service and wants to share it I think it could still be useful to all of us untrained bum mechanics who want to see if we cant link up our Di2 levers to the toaster.
Or maybe someone else has done the same thing…
Cheers