That's amazing! A two-year world tour!
My friend and I are about to embark on a tour from Miami to Brazil. The longest tour I've done was a 9 day tour from NYC to NC. This new tour is definitely more intense. We did it with only one rack on one of the bikes and back packs. I never used those side packs you have down the side of your bike or had anything on my handle bars. I heard that it's hard to steer with luggage on your handle bars like the way you have it in your picture. Is that true? And where was your world tour? Any suggestions for ours?