Fred or Sveta, regarding that last photo, I really think one of you needs to have a talk with the lazy one riding in front of the bike who appears not to want to contribute to pedalling power.
I feel this is not a very egalitarian sharing of work for your trip!...
Fred answering: keep it for you!!! the technical part of the tandem is on my duty and Sveta believe that it's normal like this!! 2 years now I just have to manage the handlebar, and the brakes when she is not tired enough.