I discovered the bottom hole in a Rotopax would slide onto the passenger footpegs and strap to the side TCI luggage rack braces. For years I've carried two 30oz MSR in the Sweetcheeks. Just added the 6.6 Safari to the TE630.
2 Rotopax = 2 gal
Safari tank = 6.6 gal
2 MSR in Sweetcheeks seat cover = .5 gal
Total = 9.1 gal if I ever needed it (haven't yet)
9.1 x 45mpg = 409miles
Husky fully fueled w/ loaded Wolfmans ~ 425lbs and fuel weight is nice and low on bike.