That's one seriously big tailpack!

It's true what they say though....buy a big bag, and you
will fill it. I think back to my first forays abroad on the bike, and I managed with a tailpack no bigger than a 12" cube, plus a small tankbag. Now I have 2 RT panniers, a topbox
and a small tankbag....and can still occasionally struggle to find space for everything.
Pete