Hello Stepnerd and welcome from Virginia. I have the Touring R3 and have made it 198 miles on a tank of gas without running out on my long hauls. I ride between 80-85 MPH, (pretty well loaded up) and that seems to be reliable for me. I less during the blistering hot weather though, around 185 give or take a few.
I like that video above quite a bit and think it is a good idea. I'm a cheap skate though and those bottles cost a pretty penny. But they look better than a Gerry can or plastic red can strapped to the back of the bike. And of course, they are cheap insurance if you find yourself out of gas between stations.
Good luck and enjoy our family here on the forum.